As consumer electronics, smart home products, and compact industrial control equipment continue to evolve toward slimmer and smaller designs, the available space for internal components is becoming increasingly limited. As a fundamental component for signal and power transmission, connectors are now expected to deliver lower profiles, higher density, and greater reliability. Kinghelm has introduced the KH-A12501-04AWB, a 1.25mm-pitch, 4-pin, horizontal SMT wire-to-board connector. Featuring an ultra-low-profile horizontal mounting design, stable electrical performance, and standardized tape-and-reel packaging, it offers a competitive connection solution for compact and precision electronic devices. Kinghelm KH-A12501-04AWB Product Image 1. Ultra-Low-Profile Horizontal Design for Compact PCB Layouts The KH-A12501-04AWB features a single-row, 1×4-pin configuration with a 1.25mm pitch and a horizontal surface-mount (SMT) design. Unlike vertical through-hole or upright connectors, its horizontal mounting structure effectively reduces the component's vertical height above the PCB. According to the product specification drawing, the connector has a board-mounted height (Z-axis) of just 1.95mm and a bottom width (Y-axis) of 5.5mm. Its ultra-low-profile structure makes it ideal for products with limited internal space, such as Bluetooth earbud charging cases, compact sensor modules, portable medical devices, wearable accessories, and small household appliances. By reducing vertical space requirements inside the enclosure, it provides greater flexibility for product structural design and helps address space constraints in slim electronic devices. The specification drawing also highlights a distinctive structural feature: 2-pin and 3-pin versions do not have a central positioning slot, while versions with 4 pins or more incorporate one. As a 4-pin model, the KH-A12501-04AWB features this positioning slot. When used with the matching wire housing, the structure provides a locking mechanism that helps prevent accidental disconnection caused by cable pulling or vibration. This improves vibration resistance and makes the connector suitable for applications such as automotive auxiliary modules and sports-oriented smart devices that may experience continuous vibration and mechanical shock. 2. High-Quality Terminal Materials for Reliable Electrical Transmission In terms of electrical performance, the KH-A12501-04AWB has a rated current of 1A and a rated voltage of 125V AC/DC, making it suitable for most low-power signal circuits and low-voltage power supply applications. The contact terminals are made of phosphor bronze (C5191) with gold plating. Phosphor bronze offers excellent elasticity and fatigue resistance, helping maintain stable contact pressure even after repeated mating and unmating cycles. The gold-plated surface helps prevent oxidation and resist corrosion in humid environments. The maximum contact resistance is controlled within 20mΩ, ensuring reliable signal transmission and reducing the risk of intermittent connections or signal fluctuations caused by poor contact. In addition, the connector provides a minimum insulation resistance of 100MΩ and a dielectric withstand voltage of 500V AC for one minute, offering reliable electrical insulation and helping prevent short circuits. 3. High-Temperature-Resistant and Flame-Retardant Housing for Reliable Operation Across a Wide Temperature Range For thermal resistance and fire safety, the connector housing is made of PA9T material, with a UL94 V-0 flame-retardant rating. PA9T is a high-performance engineering plastic widely used in the electronics industry for applications requiring heat resistance and flame retardancy. The operating temperature range is -25°C to +85°C. This enables the connector to operate in cold environments, including low-temperature start-up conditions in northern regions, while also withstanding heat buildup during prolonged operation inside enclosed electronic devices. These characteristics make the connector suitable for electronic products requiring long-term, continuous operation. Its material properties help reduce the risk of housing softening or deformation under temperature fluctuations, while providing an additional level of fire safety for consumer electronics and compact industrial equipment. Kinghelm KH-A12501-04AWB Product Specification Sheet 4. Tape-and-Reel Packaging for Automated SMT Production Production compatibility is another key advantage of the KH-A12501-04AWB. The product is supplied in tape-and-reel packaging, making it compatible with standard SMT pick-and-place equipment. It can be directly loaded onto automated production lines for high-speed placement, eliminating manual insertion processes, reducing labor costs, and improving placement consistency. Automated mounting also helps minimize assembly errors and soldering defects. The PCB footprint and recommended solder pad dimensions are clearly defined in the product specification drawing. PCB layout engineers can refer to these specifications when designing the corresponding PCB pads, helping improve design accuracy and shorten the preliminary verification cycle. With a total product weight of only 0.51g, the connector also supports lightweight design requirements in modern electronic products. 5. Application Scenarios and Overall Product Advantages Although wire-to-board connectors are small components, they play an essential role in the reliable operation of electronic devices. As critical connection points for power and signal transmission, connector failures can lead to power interruptions, signal loss, and even complete equipment malfunction. The Kinghelm KH-A12501-04AWB is designed for the widely used 1.25mm-pitch connector market, with particular emphasis on the ultra-low-profile horizontal mounting configuration. It achieves a practical balance between compact dimensions, electrical performance, mechanical reliability, and manufacturing convenience. More than just a basic connection between wires and circuit boards, it provides structural designers and hardware engineers with a standardized and mature interconnection solution for compact electronic products. As smart hardware continues to become increasingly miniaturized, demand for ultra-low-profile, 1.25mm-pitch horizontal connectors is expected to grow. Backed by Kinghelm's established connector development and manufacturing capabilities, the KH-A12501-04AWB incorporates carefully selected materials, optimized structural design, and packaging suitable for automated manufacturing. It can provide stable and reliable connection support for applications in smart home systems, IoT sensors, portable electronics, and other compact electronic devices, making it a connector worth considering for space-constrained wire-to-board applications. About Kinghelm According to Song Shiqiang, Kinghelm (www.kinghelm.net) is committed to meeting the RF and microwave signal and data transmission requirements of smart hardware, including signal reception, transmission, and protection. Kinghelm provides customers with a comprehensive range of complementary products, including antennas, connectors, jumper cables, interconnect components, and terminals. Its product portfolio covers USB Type-C connectors, SMA, IPEX, and MCX RF connectors, HDMI connectors, RJ45 Ethernet connectors, automotive wiring harnesses, adapter cables, pin headers and female headers, terminals, GPS antennas, RF coaxial connectors, Wi-Fi antennas, BeiDou (BDS) antennas, embedded navigation and positioning antennas, 4G communication antennas, Bluetooth ceramic antennas, and a wide variety of switches. Its switch product range includes tactile switches, detection switches, slide switches, push-button switches, micro switches, multifunction switches, illuminated switches, DIP switches, toggle switches, and other types of electronic switches. Together with the electronic components, sensors, TVS diodes, and other products supplied by Slkor (www.slkoric.com), Kinghelm provides products, supporting solutions, and technical services to tens of thousands of customers worldwide. KH-A12501-04AWBView Product Details

As consumer electronics, smart sensors, and compact IoT devices continue to move toward thinner, lighter, and more miniaturized designs, the available space on PCBs is becoming increasingly limited. Fine-pitch SMT wire-to-board connectors have therefore become critical components in mechanical and electrical design. The Kinghelm KH-A12501-03AWB is a 1.25 mm-pitch, 3-pin, horizontal SMT wafer header. Featuring an ultra-low profile above the PCB, stable electrical performance, and a design suitable for automated SMT production lines, it provides a reliable domestic alternative for wire-to-board signal connections in space-constrained applications. Kinghelm KH-A12501-03AWB Product Image Key Product Specifications Parameter Specification Model KH-A12501-03AWB Pitch P = 1.25 mm Number of Pins 3 pins (single row, 1 × 3) Mounting Type Horizontal SMT Height Above PCB (Z-axis) 1.95 mm Bottom Width (Y-axis) 5.5 mm Rated Current 1 A Rated Voltage 125 V AC/DC Operating Temperature -25°C to +85°C Insulator Material PA9T, UL 94 V-0 flame-retardant Contact Material C5191 phosphor bronze, gold-plated Packaging Tape-and-reel Ultra-Low-Profile Horizontal Design for Space-Constrained Applications The key feature of this connector is its ultra-low-profile horizontal design, with a height above the PCB of just 1.95 mm. Compared with vertical headers of the same pitch, this configuration can significantly reduce the overall assembly height, making it particularly suitable for products with strict thickness limitations, such as wearable devices, smart sensors, compact home appliances, camera modules, and Bluetooth or Wi-Fi modules. With a precision 1.25 mm pitch and a single-row, 3-pin layout, the connector supports power and low-speed signal transmission while helping conserve PCB layout space. Its horizontal, side-entry connection configuration also helps avoid mechanical interference associated with vertical connections, giving mechanical engineers greater flexibility when designing compact assemblies. In addition, the product features controlled dimensional tolerances and clearly defined PCB footprint requirements, helping hardware engineers integrate the connector into PCB layouts and shorten development cycles. Carefully Selected Materials for Electrical and Environmental Reliability The KH-A12501-03AWB combines heat resistance, flame retardancy, and stable electrical performance through its material selection and structural design. The insulating housing is made of PA9T engineering plastic, which offers good resistance to reflow soldering temperatures, low moisture absorption, and dimensional stability. Its UL 94 V-0 flame-retardant rating supports the requirements of many general-purpose consumer electronics applications. These properties help reduce the risk of melting, warping, or deformation during high-temperature SMT soldering. The conductive terminals are made of C5191 phosphor bronze, a material known for its elasticity and fatigue resistance. These properties help maintain contact force through repeated mating cycles. Gold plating on the contact surfaces helps resist oxidation and maintain reliable electrical contact. According to the supplied product specifications, the connector offers the following electrical performance: Contact resistance: ≤20 mΩ Insulation resistance: ≥100 MΩ Withstand voltage: 500 V AC for 1 minute Operating temperature: -25°C to +85°C These characteristics support reliable operation across a wide temperature range encountered in many indoor and outdoor electronic devices, helping reduce the risk of signal interruptions and intermittent connections. Note: The electrical performance figures above are based on the supplied product information and should be confirmed against the manufacturer's official datasheet before final design qualification. Tape-and-Reel Packaging for Automated SMT Production Compatibility with automated manufacturing is another important advantage of the KH-A12501-03AWB. The connector uses standard tape-and-reel packaging and is designed for automated SMT assembly. It can be automatically fed, picked up, and placed by suitable high-speed pick-and-place equipment, eliminating the need for manual through-hole insertion and helping improve production efficiency. Automated placement can also reduce alignment errors and certain defects associated with manual assembly, lowering manufacturing costs. Positioning solder tabs on both sides of the connector help secure it to the PCB during reflow soldering. Once properly soldered, these tabs can improve mechanical retention and resistance to displacement, supporting applications exposed to moderate vibration, such as portable test instruments and small UAV control modules. Kinghelm KH-A12501-03AWB Specification For PCB footprint design, mechanical integration, and electrical verification, engineers should consult the official KH-A12501-03AWB datasheet for detailed dimensional drawings, recommended PCB land patterns, tolerances, and electrical specifications. Versatile Applications: A Domestic Alternative for 1.25 mm Horizontal Connectors The Kinghelm KH-A12501-03AWB 1.25 mm ultra-low-profile, horizontal 3-pin wire-to-board connector is suitable for a broad range of electronic applications. Smart home devices: Connects mainboards to wiring harnesses in passive infrared sensors, door and window sensors, and temperature and humidity sensing modules. Wearable consumer electronics: Supports connections between internal PCBs and batteries or sensors in smart bands, earphones, and similar compact devices. Industrial electronics: Provides low-current power and signal connections for compact data acquisition modules and control boards. Security and imaging equipment: Can be used in security cameras, compact camera modules, and related electronic assemblies. Wireless communication modules: Supports board-to-wire connections in Bluetooth and Wi-Fi modules. Small home appliances: Provides compact interconnections for control boards and internal wiring harnesses. For engineers evaluating alternatives to imported connectors with comparable specifications, Kinghelm's product offers a domestic sourcing option. Local technical support, supply-chain coordination, and competitive pricing may help simplify procurement and reduce material delivery risks. Final component selection should take into account mating connector compatibility, wire specifications, insertion and withdrawal requirements, soldering conditions, mechanical clearances, and the application's electrical and environmental requirements. Precision Connectors from Kinghelm As a Chinese electronic component manufacturer, Kinghelm continues to develop products in RF connectors, antennas, and precision wire-to-board interconnection solutions. Its product development and manufacturing capabilities encompass material selection, mold development, metal stamping, plastic injection molding, and product inspection. According to the supplied company information, its wafer headers undergo reliability evaluations covering electrical performance, mating cycles, high- and low-temperature exposure, and humidity resistance. The KH-A12501-03AWB 3-pin, 1.25 mm ultra-low-profile horizontal SMT wafer header balances miniaturization, electrical performance, and suitability for mass production. It offers hardware engineers a practical interconnection option for compact, low-voltage signal and power applications where PCB space and assembly height are limited. For applications requiring a compact SMT wire-to-board interface, the KH-A12501-03AWB is a candidate worth evaluating as part of a domestic component sourcing strategy. About Kinghelm Kinghelm (www.kinghelm.net) specializes in a wide range of connectors and switches, including headphone jacks, DC power jacks, FPC connectors, USB connectors, waterproof USB connectors, detection switches, vertical detection switches, through-hole detection switches, SMT coding switches, limit switches, rotary coding switches, tactile push buttons, Type-C receptacles and interfaces, joystick switches, five-way switches, and thumbwheel switches. Key models in the company's Kinghelm KH series include KH-6X6X6H-STM, KH-IPEX-K501-29, KH-6X6X5H-STM, KH-6X6X5H-Z2J, KH-3216-H0209, KH-VH-PT3.96, and KH-SMA-P-8029. These products complement the electronic components offered by Slkor (www.slkoric.com), including electronic components, sensors, TVS diodes, power devices, and clock ICs. Together, the two product portfolios provide a broad range of components and technical support services to customers worldwide. KH-A12501-03AWBView Product Details

A crimp terminal is the metal contact that connects a wire to a connector system. It is not the plastic shell that holds it. That distinction sounds simple, but it causes a large share of wrong quotations, mismatched samples, and failed builds. A buyer may ask for a "crimp terminal" and receive a shell, a PCB header, or a complete cable assembly. None of those is the same part. The confusion comes from using one phrase at different levels of a connection system: the metal contact, the plastic shell, and the complete mated system. This guide separates those levels, compares wire-to-wire and wire-to-board connections, and establishes a practical selection sequence. It does not cover standalone ring, spade, or quick-disconnect terminals. What Is a Crimp Terminal? A crimp terminal is a metal contact with a crimp barrel that is permanently deformed around a stripped wire. The conductor crimp compresses the wire strands and creates the electrical connection. The insulation crimp grips the wire insulation and provides strain relief. The mating end provides the electrical interface with the opposite contact. Crimping is a controlled compression process: strip the wire, insert it into the terminal, crimp with the specified tool, and insert the terminal into the shell. Crimp height, crimp width, and tooling must match the terminal and wire. A crimped joint can look acceptable and still fail a pull test, a temperature-rise test, or a vibration test. Soldering is a different joining method and should not be used to compensate for a poor crimp. Understanding the definition and crimping process leads to another question: which part in the connector system is actually being requested? In purchasing, the most common confusion is not how crimping works, but the difference between the metal contact, the plastic shell, and the complete mated system. These parts work together, yet they perform different functions and normally carry separate part numbers. Their roles can be separated as follows: The crimp contact carries the signal or current and provides the mating end. The terminal shell positions and protects the contact and may provide keying, locking, and strain relief. The mating interface connects the shell to another wire shell or a PCB header. The wire and crimp tool belong to the manufacturing process, not to the finished connector. In a catalog, the three roles above may appear under separate part numbers, which is why one request for a "crimp terminal" can produce quotations for different objects. What Are the Different Types of Crimp Terminals? Classification should start with the role a product performs, because each role has different dimensions, mating requirements, and failure modes. This is more useful than sorting products by the wording used on a catalog page. Crimp Contacts At the contact level, the decisive fields are the mating end, wire range, plating, and locking feature. Pin, socket, blade, and custom shapes all follow the same logic: the mating end fixes the interface, while the crimp barrel fixes the wire and tooling. Contact material and plating affect resistance, mating cycles, and corrosion, so confirm them in the applicable specification. A locking lance, where present, is easy to overlook. If it is damaged, or if the contact is inserted into the wrong shell, the contact can back out under vibration or during mating. Do not assume that a product described as a terminal is a standalone crimp contact. PCB terminals, headers, and other board-mounted parts may use similar terminology while serving a different function. Confirm the mating end, termination method, wire range, and mounting style from the drawing rather than relying on the product name alone. Crimp Terminal Shells At the shell level, comparison moves from metal geometry to the mechanical family. Pitch is the center-to-center distance between adjacent contacts. Commonly used pitches include 1.25 mm, 2.0 mm, 2.5 mm, 2.54 mm, and 3.96 mm. These are different families, not interchangeable formats. Pitch alone does not define compatibility. Two shells with the same pitch can have different contact cavities, keying, locking, and panel features. Position count and row layout also change the interface. These details determine whether the shell accepts the correct contact, prevents wrong mating, and provides the required strain relief. A shell should therefore be selected as part of a qualified contact-and-shell system. The existence of a similar opening or the same pitch is not proof that another contact will lock, align, or perform correctly. Wire-to-Wire and Wire-to-Board Crimp Connectors At the system level, the question changes from "what holds the contact?" to "what does the shell mate with?" A wire-to-wire crimp connector joins two wire-mounted shells. It is common in inline cable connections, extensions, and harness-to-harness interfaces. Both sides have contacts and shells, and no PCB header is involved. A wire-to-board crimp connector joins a wire-mounted shell to a PCB header. The cable side has the contact and shell. The board side has a header, also called a wafer. The header is a separate component that provides the board-side pins or sockets and must not be treated as the crimp terminal. The choice affects mounting, mating direction, panel space, serviceability, and PCB layout. A wire-to-board design needs a board footprint that matches the header, not only a cable-side shell that matches the wire. Published ratings require the same care. A rating for a contact, shell, or header does not automatically represent the complete mated system. As a first screening rule, the system is limited by its lowest-rated element, but the actual limit can also depend on temperature rise, energized contact count, wire gauge, and test conditions. Use the manufacturer's system-level rating or validate the complete assembly. Part or system Role in the assembly Typical application Main selection factors Crimp contact Carries the signal or current and provides the mating interface Inside a wire-mounted shell Wire range, plating, mating end, locking lance, crimp tool Crimp terminal shell Positions contacts and provides the mechanical interface Cable-side connector body Pitch, positions, row layout, gender, keying, material, temperature Wire-to-wire system Joins two wire-mounted shells Inline cable connections and harness extensions Mating pair, keying, locking, wire range, strain relief Wire-to-board system Joins a cable shell to a PCB header Board-to-cable connections inside equipment Header series, pitch, mounting direction, board footprint, current rating PCB header (wafer) Provides the board-side mating interface Soldered or mounted to the PCB Pitch, pin count, straight or right-angle, current, voltage, temperature For a closer comparison of two common wire-to-board families, see Comparison of XH Connector and VH Connector. For the wider selection framework, see How to Choose the Right Wire-to-Board Connector for PCB. The classification now answers what is being sold and what must mate with it. It does not yet answer whether a particular combination suits a specific wire, electrical load, and production process. Those questions require moving from product types to an evaluation sequence. How to Choose the Right Crimp Terminal? Selection follows the order in which the parts are assembled. The wire goes into the contact, the contact goes into the shell, the shell mates with another shell or a PCB header, and the crimp is formed with a tool. Following this order exposes a mismatch before it reaches the next step. Wire Gauge and Conductor Type The terminal's crimp barrel must match the wire range. Conductor size, strand count, and insulation diameter all matter. A fine-strand wire can be difficult to crimp with a tool designed for solid or coarse-strand wire. The strip length must match the crimp zone: too short, and the conductor crimp may miss strands; too long, and the wire may protrude into the mating area. The insulation crimp requires its own check. Too loose, and it will not provide strain relief; too tight, and it can damage the wire. Wire selection is therefore complete only when the conductor, insulation, strip length, and crimp tool all fit the contact design. Current and Voltage Ratings Compare the operating duty with the exact contact, shell, header, and wire. A headline current or voltage figure is incomplete without its test conditions. Ambient temperature, energized contact count, wire gauge, spacing, and insulation all affect the acceptable operating limit. Apply the required derating and use the manufacturer's system rating when available. If that rating is not published, validate the complete assembly. A component-level value should not be presented as proof that the mated system will meet the application. Terminal and Shell Compatibility Mechanical compatibility is where the three classification levels meet. The contact must fit the cavity in the shell and engage its locking feature. The shell must mate with the correct header or opposite shell. Pitch, positions, row layout, gender, keying, and locking all need to agree. Use the manufacturer's mating chart or drawing rather than a visual match. A damaged locking lance, an incorrect cavity, or a shell from a similar-looking series can allow the contact to push out under load. The part may fit during assembly and still fail after vibration or repeated mating. Installation and Operating Conditions The final check is process compatibility. The crimp tool and applicator must be specified for the terminal and wire. For production, use qualified tooling and validated crimp settings. Inspect crimp height, crimp width, and pull strength, and verify insertion and withdrawal force against the applicable product specification. A hand tool may be acceptable for prototypes, but not automatically for production. Vibration, moisture, chemicals, temperature, and mating cycles also belong in the review. A connector that works on a bench may not survive a moving vehicle, an outdoor enclosure, or a high-vibration machine. These checks produce eight concrete answers: Checkpoint Question to answer Connection type Is the interface wire-to-wire or wire-to-board? Wire What are the conductor size, strand type, insulation diameter, and strip length? Electrical duty What are the current, voltage, ambient temperature, and derating conditions? Mechanical interface What are the pitch, positions, row layout, gender, orientation, and locking method? Compatibility Are the contact, shell, header, and tooling from the same qualified series? Environment Are vibration, moisture, chemicals, and mating cycles within the product rating? Production Are the crimp tool, applicator, inspection method, and pull test defined? Documentation Are the applicable drawing, specification, and compliance documents available? These answers prepare the sample for approval. A missing or assumed answer leaves the interface unverified; it does not mean the risk is low. Common Mistakes When Selecting Crimp Terminals Most wrong-part orders happen when a required answer is absent and work continues anyway. The failure paths below show what can happen when one of the earlier checkpoints is skipped. Skipped check Possible consequence Required correction Matching from a photo The selected part may have different keying, locking, or cavity dimensions. Compare the exact series, drawing, and mating chart. Checking only the nominal wire size The conductor crimp may be loose, or the insulation may be crushed or poorly supported. Check conductor range, strand type, insulation diameter, strip length, and tooling. Mixing similar product series The parts may not lock or mate, or the contact interface may become unreliable. Use a qualified contact, shell, and header family confirmed by the manufacturer. Using a component rating as the system rating The assembly may overheat because the contact, shell, or wire becomes the limiting element. Validate the complete mated system and apply the required derating. Approving only a visual crimp sample The joint may fail a pull test, vibration test, or temperature-rise test after appearing acceptable. Qualify the tooling and define crimp inspection, pull-test, and environmental criteria. A photo can help identify orientation or product shape. It cannot verify cavity, material, plating, wire range, tooling, or ratings. The contact, shell, header, wire, and crimp process must be approved as one system, and the interface must be rechecked whenever any part changes. Conclusion The quotation mismatch at the beginning is not simply a wording problem. It comes from starting with a loose category instead of identifying the function of the requested part. A crimp terminal is the metal contact, not the plastic shell. The contact carries the signal or current; the shell positions and protects it; the PCB header provides the board-side interface; the wire and crimp tool complete the manufacturing process. Use that distinction to classify the product first, then select in assembly order: define the connection type, choose the series and pitch, verify the wire and electrical requirements, confirm contact, shell, and header compatibility, and validate the crimp process. This sequence prevents an unchecked interface from passing into a quotation or production release. For exact specifications, compatible contact-and-shell combinations, drawing confirmation, or help reviewing a proposed assembly, contact Kinghelm's technical team. Send the intended wire, current and voltage conditions, mating direction, available space, and the proposed part drawings so the team can check the interfaces together.

As consumer electronics, smart hardware, and compact industrial modules continue to evolve toward slimmer and smaller designs, PCB space is becoming increasingly valuable. Low-profile, high-density wire-to-board connectors compatible with automated SMT production have become essential components in modern hardware design. The Kinghelm KH-A12501-02AWB is a 1.25mm-pitch, 2-pin, right-angle surface-mount wire-to-board header. Featuring an ultra-low-profile structure, stable electrical performance, and tape-and-reel packaging suitable for automated production lines, it offers distinct advantages for signal connection applications in space-constrained environments, providing hardware engineers with a cost-effective interconnection solution. Kinghelm KH-A12501-02AWB Product Image 1. Ultra-Low-Profile Right-Angle Design for Space-Constrained PCB Layouts The KH-A12501-02AWB features a single-row, 1×2-pin configuration with a 1.25mm pitch and a right-angle surface-mount device (SMD) mounting design. Its on-board height along the Z-axis is only 1.95mm, while its base width along the Y-axis is 5.5mm, making it a typical ultra-low-profile connector. Compared with conventional vertical-mount connectors, its horizontal orientation minimizes the vertical space occupied within the enclosure, making it ideal for compact products where the battery sits close to the mainboard or housing thickness is strictly limited. The product is supplied in tape-and-reel packaging, allowing direct compatibility with high-speed SMT pick-and-place machines. It supports automated feeding, placement, and reflow soldering, eliminating manual through-hole insertion and significantly improving production efficiency while reducing the risk of cold solder joints and incorrect assembly. This makes it well suited to the demands of modern, large-scale electronic manufacturing. With a gross weight of just 0.435g per unit, its lightweight design also helps reduce the overall weight of the module, making it particularly suitable for weight-sensitive devices such as wearables, drones, and compact sensors. 2. Excellent Electrical Performance for Reliable Long-Term Connections In terms of electrical performance and environmental reliability, this connector offers a clear set of specifications. It is rated for a current of 1A and a voltage of 125V DC, making it suitable for the signal lines and low-power supply circuits found in most electronic devices. Its operating temperature range extends from -25°C to +85°C, enabling it to accommodate a variety of environments, including indoor electronics, compact industrial data acquisition modules, and auxiliary automotive accessories, while maintaining stable connections under temperature fluctuations. The contact base material is phosphor bronze, which provides durable elasticity and consistent contact force. Even after repeated mating and unmating cycles, the contacts are designed to maintain stable contact pressure, helping reduce the risk of loose connections and intermittent signal interruptions. The contact areas are gold-plated to reduce contact resistance and improve oxidation and corrosion resistance. This helps prevent oxidation and tarnishing during long-term use, minimizing signal degradation and contact failures while preserving signal integrity. 3. Flame-Retardant PA9T Housing for Reliable Soldering and Safety The insulating housing is made of PA9T specialty engineering plastic and meets the UL 94 V-0 flame-retardancy standard, providing an important layer of safety protection. PA9T offers excellent heat resistance and is designed to withstand the high temperatures associated with reflow soldering while minimizing the risk of deformation, resin overflow, and blistering. It is therefore suitable for high-temperature SMT soldering processes. The material also offers good electrical insulation, chemical resistance, and dimensional stability. Even in humid environments or conditions involving light oil contamination, the housing can help maintain reliable insulation and reduce the risk of short circuits. Its stringent flame-retardancy rating means the material can self-extinguish under specified test conditions, helping improve the overall safety margin of the finished product. These characteristics make it suitable for consumer electronics, security equipment, and smart home products that must meet specific safety requirements. Kinghelm KH-A12501-02AWB Datasheet 4. Versatile Applications Across Slim and Compact Smart Hardware The KH-A12501-02AWB has a clearly defined application focus. Its 2-pin configuration is commonly used for single-channel signal connections or low-power supply connections. Typical applications include smart wristbands, Bluetooth earphone charging cases, compact camera modules, smart home sensors, lithium battery protection boards, industrial data acquisition probes, and drone lighting boards. In many slim and compact smart devices, internal space is extremely limited, particularly in the vertical direction. Conventional high-profile connectors may be difficult to accommodate, whereas this ultra-low-profile, 1.95mm-high right-angle header can help overcome PCB layout constraints. Standardized PCB footprint drawings also make it easier for engineers to incorporate the component directly into their PCB designs. The pin arrangement and solder pad dimensions are optimized to support secure solder joints and reliable mechanical connections, making the connector suitable for equipment exposed to a certain degree of vibration. 5. Standardized Domestic Components for a More Controllable Supply Chain As a standardized product from Kinghelm, a Chinese connector brand, the KH-A12501-02AWB combines the advantages of domestic sourcing with consistent product quality. Kinghelm has long specialized in RF antennas and connector interconnection products, with established manufacturing capabilities spanning mold development, injection molding, terminal stamping, and surface plating. Strict specification control, comprehensive datasheets, and PCB footprint drawings provide valuable technical support for hardware development. The same product series also offers versions with 3, 4, and 5 pins, among other configurations. By adopting a consistent 1.25mm pitch across the series, engineers can flexibly select connectors with different pin counts within the same product platform, helping reduce material management costs and simplify design iterations. Overall, the KH-A12501-02AWB is an economical and reliable interconnection component designed for compact electronic devices. Its combination of a high-density 1.25mm pitch, ultra-low-profile right-angle design, gold-plated phosphor bronze contacts, flame-retardant PA9T housing, and tape-and-reel packaging for SMT assembly directly addresses the challenges of wire-to-board connections in space-constrained hardware. As the consumer electronics industry continues to pursue thinner and more compact products and the adoption of domestically manufactured components accelerates, standardized, reliable, and mass-production-friendly connectors such as this one will continue to support innovation in smart hardware, compact industrial modules, security systems, and sensor applications. They represent a practical and dependable choice for hardware engineers seeking reliable interconnection solutions in their bills of materials (BOMs). About Kinghelm Kinghelm(www.kinghelm.net) places strong emphasis on new product development, quality control, and customer service. Its wireless signal transmission and reception product portfolio includes BeiDou/GPS navigation and positioning antennas, ceramic Bluetooth antennas, Wi-Fi antennas, communication antennas, flexible embedded FPC antennas, and filters. Its signal transmission, connection, and interconnection products include RF adapter cables, coaxial connectors, electrical signal connectors, and interfaces such as Type-C, IPEX, SMA, RJ45, HDMI, MCX, and USB, along with supporting pin headers, female headers, terminals, sockets, and connectors. The company also offers DIP switches and tactile switches. In addition, Kinghelm provides customized non-standard and specialized products, as well as integrated solutions, tailored to the requirements of customers in the automotive, industrial, medical, equipment manufacturing, data storage and computing, and smart terminal sectors. KH-A12501-02AWBView Product Details

In industrial control boards, smart home modules, audiovisual equipment, instrumentation, and other electronic products, compact through-hole push button switches are essential components for human-machine interaction. Many projects require optimized PCB layout space while maintaining consistent tactile feedback and reliable electrical contact. The Kinghelm KH-PB-22E18-WS six-pin momentary push button switch offers a practical solution for through-hole designs, featuring a compact 8 mm × 8 mm base, a total height of 17 mm, and a double-pole double-throw (DPDT) circuit configuration. It is well suited for selection in high-volume consumer electronics and industrial applications. Kinghelm KH-PB-22E18-WS Product Image 1. Key Product Specifications: Compact Six-Pin Through-Hole Design with Momentary Operation The KH-PB-22E18-WS is a through-hole push button switch with a base measuring 8 mm × 8 mm and a total height of 17 mm. It features a blue plunger cap, a non-illuminated design, and a six-pin terminal arrangement compatible with standard PCB footprint layouts. The switch features a momentary, self-resetting mechanism. It establishes an electrical connection when pressed and automatically returns to its original position when released. Unlike latching switches, which maintain their state after activation, this design is ideal for momentary triggering applications such as function activation, signal reset, temporary start/stop control, and parameter adjustment. Its double-pole double-throw (DPDT) configuration provides two independent switching circuits that operate simultaneously. A single switch can therefore control two signal paths, simplifying peripheral circuit routing, reducing component count, and conserving PCB space. 2. Materials and Structural Design: Durable Materials with Multiple Operating Force Options In terms of materials and construction, the switch is designed for durability and consistent operation. Knob: Made of POM (polyoxymethylene), offering good wear resistance and helping the button withstand repeated pressing without easily cracking or developing whitening. Cover: Also made of POM, with a white finish, good toughness, and resistance to deformation. Base (CASE): Manufactured from PBT 3310 material. Terminals: Made of brass. Contacts: Feature a silver-nickel composite finish, with a nickel underlayer and silver outer layer, helping resist oxidation and corrosion and maintain stable contact resistance during repeated switching. Internal spring: Made of stainless steel wire (SUS), providing resilient return force and helping maintain consistent tactile feedback over repeated operations. The product specification provides several operating force options to accommodate different tactile requirements: 120 ± 30 gf 200 ± 50 gf 300 ± 100 gf 400 ± 100 gf 550 ± 100 gf Engineers can select the appropriate operating force according to the intended product experience. Lower-force versions are suitable for portable consumer electronics and small household appliances, while higher-force versions can be considered for industrial control equipment where resistance to accidental activation is important. The total travel is 2.5 ± 0.2 mm, providing a defined actuation distance and clear tactile feedback for responsive operation. 3. Installation Compatibility: Through-Hole Mounting for PCB-Friendly Design The switch uses through-hole mounting, with pins designed for conventional PCB assembly. Its plug-in construction is compatible with traditional wave soldering processes and can offer greater tolerance during assembly than some surface-mount switch designs. It is suitable for manual insertion and high-volume production, helping manufacturers adopt the component without major changes to existing production lines. The PCB footprint uses a six-pin matrix arrangement with a center-to-center pin spacing of 2.5 mm. The technical drawing provides a reference for the recommended bottom-side PCB pad layout. Hardware engineers can use the specification to develop the correct footprint and reduce the risk of misaligned pins, cold solder joints, and solder bridging caused by incorrectly sized pads. Each unit has an approximate gross weight of 0.84 g and is supplied in bags, facilitating inventory management and production-line material distribution. This packaging format also supports bulk procurement and production planning. Kinghelm KH-PB-22E18-WS Product Datasheet 4. Wide Range of Applications Across Electronic Products The KH-PB-22E18-WS six-pin momentary push button switch is suitable for a wide variety of applications. Consumer electronics: It can be used for momentary controls on audio amplifiers, set-top boxes, auxiliary vehicle control panels, desktop humidifiers, and charging equipment. Industrial applications: Potential uses include reset buttons for test instruments, industrial control boards, access control modules, and security alarm systems. Other applications: The switch can also be considered for compact medical devices, educational laboratory instruments, and communication terminals, subject to the electrical and environmental requirements of the end product. Its DPDT configuration is particularly useful in circuits that require two signal paths to be switched simultaneously or linked through a single mechanical operation. Compared with using two separate single-pole switches, a single DPDT switch provides coordinated mechanical actuation of both circuits, avoiding differences in actuation timing between independently operated buttons. 5. Quality Control and Key Selection Considerations Kinghelm has extensive experience in electronic components, including RF connectors, push button switches, and antennas. Under the leadership of Song Shiqiang, the team continues to refine structural designs and quality control processes. According to the product information, the KH-PB-22E18-WS undergoes pre-shipment testing covering switching life, spring-force stability, and resistance to temperature and humidity. These tests are intended to help ensure reliable operation under typical electronic product operating conditions. The brass terminals and silver-based contact finish are designed to support stable signal transmission and reduce the risk of intermittent contact associated with oxidation. The compact 8 mm × 8 mm base is particularly advantageous for space-constrained panel designs. Its 17 mm overall height can accommodate many conventional enclosure layouts, while the blue plunger cap provides clear visual identification for users. When selecting this switch, engineers should pay particular attention to the following factors: 1. Momentary versus latching operation The KH-PB-22E18-WS is a momentary, self-resetting switch. It activates when pressed and returns to its original state when released. If an application requires the switch to maintain its state after pressing and change state upon a subsequent press, a compatible latching model from the same series should be selected instead. 2. Illuminated versus non-illuminated design This model does not include built-in illumination. Applications requiring backlighting or illuminated status indication should use an appropriate illuminated version. 3. Operating force Operating force is a key factor in determining tactile feel and resistance to accidental activation. Lower-force options provide a lighter touch suitable for consumer products, while higher-force options require greater pressure and may be more appropriate for industrial equipment where unintended activation must be minimized. 4. PCB footprint and assembly compatibility Before production, engineers should verify the pin arrangement, 2.5 mm center-to-center spacing, pad dimensions, and mechanical clearance against the official datasheet. Electrical ratings, environmental limits, and expected switching life should also be confirmed against the manufacturer's specifications for the intended application. Conclusion The Kinghelm KH-PB-22E18-WS is a compact six-pin through-hole momentary push button switch designed to balance space efficiency, operational reliability, and cost-effectiveness. Its 8 mm × 8 mm base, DPDT circuit configuration, multiple operating force options, and conventional through-hole mounting make it a practical candidate for a broad range of momentary switching applications. For hardware development engineers seeking a domestically manufactured switch with a compact footprint, practical mechanical design, and documented specifications, the KH-PB-22E18-WS is worth evaluating. It can be considered for consumer electronics, industrial control systems, security equipment, communication devices, and other electronic products. Reliable component sourcing and appropriate model selection can help streamline product development and control material costs. About Kinghelm Kinghelm Audio and Video Connectors (Headphone Jack Series) Kinghelm (www.kinghelm.net) has nearly 20 years of experience in microwave and RF technology, supported by a core technical team with backgrounds at Tsinghua University and the University of Electronic Science and Technology of China. With comprehensive laboratory testing equipment, the company can independently conduct new product development and performance verification for smart terminal devices. Its intelligent and flexible manufacturing facility in Luzhai, Guangxi, provides production capacity to support large-volume orders, enabling Kinghelm to deliver reliable products and services to customers worldwide. The Kinghelm product portfolio covers BeiDou/GPS antennas, Bluetooth and Wi-Fi antennas, and a comprehensive range of RF jumper cables and interconnects. Popular models include KH-IPEX-K501-29, KH-SMA-K513-G, KH-TYPE-C-16P, KH-SMA-KE-Z, KH-SMA-KWE17-G, KH-MMCX-Z, KH-3216-A35, and KH-IPEX4-2020. The company also offers a broad range of signal connectors, board-to-board connectors, PCB headers and sockets, and switches. In addition, Kinghelm supports customized medical wiring harnesses, automotive wiring harnesses, non-standard antennas, and connector development, providing integrated services spanning technical drawings, tooling, testing, and mass production. KH-PB-22E18-WSView Product Details

In consumer electronics, industrial control modules, instrumentation, and other electronic applications, push button switches are among the most fundamental components for human-machine interaction. A reliable, compact self-locking push button switch provides stable state retention and control for electronic products. The KH-PB-22E08, launched by Kinghelm, is an 8 × 8 mm self-locking push button switch designed for general-purpose applications and featuring through-hole mounting. With its mature structural design and reliable electrical performance, it is well suited to a wide range of electronic designs that require the switch to maintain its on/off state. Kinghelm KH-PB-22E08 Product Image The most noticeable feature of the KH-PB-22E08 is its compact size. The switch base measures 8 mm × 8 mm, and the overall height is 17 mm, helping save valuable PCB space in devices with limited internal room. It features a through-hole, plug-in package with standard PC terminals. Its mature soldering process makes it suitable for automated wave soldering as well as manual soldering and debugging, making it convenient for both mass-production manufacturers and electronics DIY enthusiasts. The product is supplied in bags, with a gross weight of just 0.855 g per unit. Its lightweight design adds virtually no extra burden to mechanical assembly. In terms of electrical configuration, this switch features six terminals and a double-pole, double-throw (DPDT) circuit structure. The six pins are arranged according to a standard PCB pad layout, with clearly defined schematic symbols and footprints. This configuration allows two independent circuits to be controlled simultaneously. Unlike momentary tactile switches that return to their original position as soon as the button is released, the KH-PB-22E08 uses a self-locking mechanism: press once to latch the switch in the ON position, then press again to release it and return to the OFF position. This means users do not need to keep the button pressed to maintain the selected state. The switch is therefore suitable for power switching, operating mode selection, and function activation or deactivation. The button features a rectangular plunger design with a blue-and-white color scheme, offering good visual recognition and a distinct tactile response. Its clear actuation feel provides users with positive feedback during operation. Regarding materials and manufacturing processes, the switch components are selected to balance durability and electrical performance. The knob is made of blue POM (polyoxymethylene), a wear-resistant, dimensionally stable engineering plastic that helps resist cracking and surface whitening during repeated operation. The base housing is made of PBT with a copper strip structure and a nickel-plated surface, providing good insulation and mechanical strength. The contact spring uses CS210R-EH copper material, while the contacts feature a silver composite plating layer. These materials provide good electrical conductivity and help maintain stable contact resistance, reducing oxidation-related issues and signal transmission losses. The internal spring is made of stainless steel wire, offering good fatigue resistance to help maintain consistent actuation performance over repeated operations. The mechanical structure also distinguishes between the latching travel and the total travel. Critical dimensions and tolerances are strictly controlled to help maintain consistent tactile feedback across mass-produced units and minimize quality variations between individual switches. From a product selection perspective, the KH-PB-22E08 is a non-illuminated, self-locking switch without an integrated LED indicator. Its simplified structure makes it suitable for applications that require mechanical latching but do not need illuminated status indication. Typical applications include compact instrument control panels, small household appliance control boards, industrial control boxes, security alarm systems, test fixtures, chassis-mounted power switches, and peripheral function-switching modules. Compared with surface-mount self-locking switches, its through-hole design provides stronger mechanical anchoring and better resistance to vibration. This can help reduce the risk of solder joint failures under vibration, making it a practical option for industrial equipment and automotive peripheral devices, subject to the requirements of the specific application. Kinghelm KH-PB-22E08 Datasheet As part of Kinghelm's push button switch product portfolio, the KH-PB-22E08 is supported by standardized mechanical drawings and specifications. PCB footprints, pin assignments, travel parameters, and bill-of-materials information are standardized, allowing engineers to refer to the datasheet when designing schematics and PCBs and reducing preliminary component verification efforts. The 8 × 8 × 17H mm form factor is widely used in the industry, offering good compatibility with established supply chains and making alternative component selection more convenient. However, several limitations should be considered during component selection. First, this is a self-locking switch and should not be used as a substitute for a momentary, self-resetting tactile switch. Second, it does not include an indicator light; applications requiring illuminated status indication should use a suitable illuminated self-locking switch instead. Finally, the through-hole package occupies space on the underside of the PCB, so sufficient clearance must be reserved for the pins and solder joints, particularly in high-density board designs. Overall, the KH-PB-22E08 is a well-balanced, general-purpose, six-terminal self-locking push button switch. Its compact 8 × 8 mm base, DPDT circuit configuration, reliable latching mechanism, durable materials, and mature through-hole mounting design make it suitable for both ease of mass production and long-term operational reliability. For electronic R&D engineers and hardware solution providers, the KH-PB-22E08 is a practical and cost-effective component choice when a compact push button switch is needed to provide latching control for two signal circuits. About Kinghelm Kinghelm (www.kinghelm.net) specializes in a wide range of connector and switch products, including headphone jacks, DC power jacks, FPC connectors, USB connectors, waterproof USB connectors, detection switches, vertical detection switches, through-hole detection switches, surface-mount coding switches, limit switches, rotary coding switches, tactile push buttons, Type-C receptacles, Type-C interfaces, joystick switches, five-way switches, rotary wheel switches, and surface-mount detection switches. Key models in Kinghelm's KH series include KH-6X6X6H-STM, KH-IPEX-K501-29, KH-6X6X5H-STM, KH-6X6X5H-Z2J, KH-3216-H0209, KH-VH-PT3.96, and KH-SMA-P-8029. These products complement the electronic components offered by Slkor (www.slkoric.com), including sensors, TVS diodes, power devices, clock chips, and other semiconductor products. Together, the two companies provide a comprehensive product portfolio and professional technical support to tens of thousands of customers worldwide. KH-PB-22E08View Product Details

Push button switches are among the most fundamental and essential components in electronic human-machine interfaces. From toys and household appliances to industrial testing instruments, countless devices rely on stable and durable push button components. The Kinghelm KH-PB-22E37-WS is a 7 × 7 × 15.9 mm (H) six-pin, through-hole momentary push button switch. With its compact structure and stable electrical performance, it is an ideal choice for momentary triggering applications in space-constrained devices and is widely suited to consumer electronics and industrial control applications. Kinghelm KH-PB-22E37-WS Product Image This push button switch features a through-hole, plug-in package and is supplied in bag packaging. With a gross weight of only 0.6 g per unit, its lightweight design makes it suitable for the structural requirements of a wide range of compact electronic products. The switch features a double-pole, double-throw (DPDT) contact configuration with six pins and a non-latching, self-resetting mechanism, commonly known as a momentary switch. Its rectangular plunger provides a crisp, responsive tactile feel. The contacts close when the button is pressed, and the internal spring automatically returns the button to its original position when released. The switch does not remain latched, making it ideal for control logic that requires an action to be triggered by pressing and released upon letting go. Typical applications include confirmation inputs, momentary signal triggering, reset functions, and wake-up signals. Durable Materials and Reliable Construction In terms of structure and materials, Kinghelm has selected components that balance durability with manufacturing compatibility. The switch housing is made of glass-fiber-reinforced, flame-retardant PBT, offering good heat resistance and dimensional stability. This makes it suitable for through-hole soldering processes, including wave soldering. The plunger is made of POM (polyoxymethylene), also known as acetal or engineering plastic. This material offers good wear resistance and smooth operation, helping reduce the likelihood of sticking, surface whitening, or damage during repeated operation. The internal contact springs feature silver-plated composite contacts, providing good electrical conductivity and stable contact resistance to help minimize signal errors and poor contact. An integrated stainless steel spring ensures fast, consistent return after each press, helping maintain a uniform operating feel over tens of thousands of actuation cycles. The switch uses PC-style terminals for through-hole PCB mounting. It supports automated through-hole insertion on production lines as well as manual soldering during prototyping and debugging. Once soldered, the terminals form a secure mechanical connection with the PCB, providing good resistance to vibration and shock. This makes the switch suitable for devices exposed to moderate mechanical vibration. Compact Footprint and Flexible Circuit Design With a 7 × 7 mm base, the KH-PB-22E37-WS is more compact than conventional switches in the 8 × 8 mm size class. Its overall height of 15.9 mm makes it particularly advantageous for products with limited PCB space or restricted internal enclosure dimensions. The accompanying datasheet clearly specifies the PCB pad layout, pin definitions, and non-shorting contact diagram. Hardware engineers can use this information directly during PCB layout and circuit design, helping reduce design errors and shorten development cycles. Unlike conventional four-pin, single-circuit switches, the six-pin DPDT configuration allows two independent circuits to be controlled simultaneously. In applications requiring two signal paths to be switched together or supporting signal-isolation verification, a single switch can trigger both circuits, simplifying PCB routing and reducing component placement requirements. Kinghelm KH-PB-22E37-WS Datasheet Wide Range of Applications The KH-PB-22E37-WS is suitable for a broad range of applications. Consumer electronics: Function buttons and reset buttons for handheld testing instruments, portable speakers, electronic toys, and compact smart home modules. Small household appliances: Momentary adjustment buttons for fans, humidifiers, and food processors. Industrial applications: Signal-triggering buttons for basic industrial control boards, test fixtures, and security system accessories. Because it uses a non-latching, self-resetting mechanism, this switch is not suitable as a conventional latching power switch for maintaining continuous power in the ON state. However, for user interfaces and control circuits requiring momentary signal inputs, it offers an attractive balance of cost-effectiveness and reliability. A Practical Momentary Switch Solution from Kinghelm As a domestic electronic component brand, Kinghelm has long focused on the development and manufacturing of RF, connectivity, and switching components. The KH-PB-22E37-WS reflects the brand's emphasis on quality control, environmental compliance, and batch-to-batch consistency. Its bag packaging also makes it convenient for small- and medium-volume procurement, prototyping, and product development. For hardware developers and electronics manufacturers, the KH-PB-22E37-WS combines a compact footprint, dual-circuit switching capability, and compatibility with common through-hole soldering processes. It is a versatile momentary push button solution that balances cost and performance. As electronic products continue to evolve toward smaller, more integrated designs, fundamental components such as the KH-PB-22E37-WS play an essential role in ensuring stable device operation. Although small and often overlooked, these components form the foundation of reliable human-machine interaction. Its clear tactile feedback, dependable electrical contact, and compact dimensions give this switch a distinct place among available push button solutions, providing a stable and economical option for a wide variety of electronic devices. About Kinghelm Kinghelm (www.kinghelm.net) specializes in microwave RF and connectivity technologies. Its extensive product portfolio covers BeiDou/GPS antennas, Bluetooth antennas, Wi-Fi antennas, RF jumper cables, signal connectors, board-to-board connectors, sockets, pin headers, and electronic switches. Its popular products include RF coaxial connectors such as KH-IPEX-K501-29, KH-SMA-K513-G, KH-SMA-KE-Z, KH-SMA-KWEI7-G, and KH-MMCX-Z, as well as the KH-TYPE-C-16P USB connector. These products are widely used in new energy vehicles, smart terminals, the Industrial Internet, smart cities, commercial aerospace, automotive electronics, and low-altitude unmanned aerial vehicles (UAVs). Leveraging its modern manufacturing facility in Luzhai, Guangxi, China, and intelligent, flexible production lines, Kinghelm has established an integrated manufacturing process encompassing product design, mold development, performance testing, and mass production. The company offers end-to-end development capabilities and supports large-volume production with consistent quality and reliable, short lead times, providing customers across industries with dependable, application-specific connectivity solutions. KH-PB-22E37-WSView Product Details

As electronic devices continue to become smaller and more widespread, push button switches have become essential components for human-machine interaction. Their size, reliability, tactile feel, and circuit functionality directly affect the overall user experience. Achieving reliable state retention within limited PCB space has become an ongoing concern for hardware engineers. Kinghelm has introduced the KH-PB-22E27 six-pin latching push button switch, featuring a compact 7 mm × 7 mm footprint and a latching mechanism. It offers a practical solution for high-density PCB layouts and space-constrained applications that require reliable state control. Kinghelm KH-PB-22E27 Product Image Product Overview The KH-PB-22E27 is a compact push button switch designed for through-hole mounting. It measures just 7 mm × 7 mm, with an overall height of 15.9 mm, and features a six-pin double-pole double-throw (DPDT) circuit configuration. Its key feature is the latching mechanism: pressing the button once locks the switch in the ON position, while pressing it again releases the latch and returns the switch to the OFF position. This allows the circuit state to be maintained without continuous pressure. Compared with non-latching switches, it offers greater convenience for applications requiring state retention and control. With its compact dimensions, the KH-PB-22E27 is well suited to applications that require both high-density PCB layouts and space-efficient, state-retaining switching. Key Specifications Parameter Specification Brand Kinghelm Model KH-PB-22E27 Mounting Type Through-hole (THT) Dimensions 7 mm × 7 mm Overall Height 15.9 mm Circuit Configuration Double-Pole Double-Throw (DPDT) Switching Mechanism Latching (press to lock / press again to release) Terminal Style PC terminals, six pins Button Shape Rectangular plunger Illuminated No Gross Weight 0.59 g Packaging Bag Design and Material Advantages Compact Structure and Precise Tolerances Designed for high-density applications, the KH-PB-22E27 takes installation and soldering requirements into account. Key dimensions marked with an asterisk (*) are subject to strict tolerance control: dimensions of 1.5 mm or less have a tolerance of ±0.1 mm, while dimensions greater than 1.5 mm have a tolerance of ±0.2 mm. The six-pin through-hole design provides stable mechanical support. Combined with its overall height of 15.9 mm, the switch can be integrated into a variety of PCB assemblies and product enclosures, subject to the specific mechanical design requirements. Carefully Selected Materials for Electrical and Mechanical Performance The KH-PB-22E27 reflects Kinghelm's focus on reliability through its material selection: Spring: Stainless steel (SUS), designed to provide consistent spring return and mechanical performance. Contact: Phosphor bronze (PBS C5210R-EH) with silver plating, supporting good electrical conductivity and low contact resistance. Terminals: Phosphor bronze or brass, with nickel underplating and a tin-plated finish. Insulating base: PBT with a UL94 V-0 flame-retardant rating. Cover and button head: Polyoxymethylene (POM), offering good wear resistance and tactile characteristics. This combination of materials is designed to provide stable electrical contact and durable mechanical performance. Kinghelm KH-PB-22E27 Specification Typical Applications With its compact size, latching mechanism, and DPDT configuration, the KH-PB-22E27 is suitable for a wide range of electronic devices requiring state retention. Instrumentation: Mode selection and power switching in measurement equipment. Home appliances: Control panels for appliances such as washing machines and rice cookers, where latching operation is required. Consumer electronics: Space-constrained products such as speakers, chargers, and compact medical devices. Office and communication equipment: Power management and function switching in electronic equipment. The through-hole mounting design facilitates both manual soldering and automated production processes, making the switch suitable for applications where space is limited and dependable operation is important. Kinghelm Quality and Technical Support Kinghelm has more than a decade of experience in the design, manufacturing, sales, and technical support of wireless signal transmission products, electronic signal connectors, and interconnection systems. Under the leadership of founder Mr. Song Shiqiang, the company continues to focus on miniaturization, high reliability, and cost-effectiveness. Kinghelm provides customers worldwide with switches, connectors, and other electronic components, supported by technical expertise and quality management throughout product design, material selection, and manufacturing. The KH-PB-22E27's dimensional tolerance controls and flame-retardant materials demonstrate the company's commitment to product quality and reliable performance. About Kinghelm Kinghelm (www.kinghelm.net) offers a broad portfolio of connectors and switching components, including headphone jacks, DC power jacks, FPC connectors, USB connectors, waterproof USB connectors, detection switches, vertical detection switches, through-hole detection switches, SMD coding switches, limit switches, rotary coding switches, tactile push buttons, Type-C receptacles, Type-C interfaces, joystick switches, five-way switches, rotary wheel switches, and SMD detection switches. Key models in the Kinghelm KH series include KH-6X6X6H-STM, KH-IPEX-K501-29, KH-6X6X5H-STM, KH-6X6X5H-Z2J, KH-3216-H0209, KH-VH-PT3.96, and KH-SMA-P-8029. Together with Slkor (www.slkoric.com), which supplies electronic components, sensors, TVS diodes, power devices, clock ICs, and other semiconductor products, Kinghelm forms part of a complementary product portfolio designed to serve customers worldwide with a broad range of electronic components and professional technical support. KH-PB-22E27View Product Details

As consumer electronics and industrial equipment continue to evolve toward slimmer designs and higher integration, a compact and reliable push button switch can make all the difference in fitting every required function onto a PCB. The KH-PB-22E75-WS push button switch from Kinghelm is an ultra-compact through-hole solution designed for space-constrained applications. With a compact footprint of just 5.8 mm × 5.8 mm, it integrates a six-pin double-pole double-throw (DPDT) configuration and a momentary, self-resetting mechanism into a footprint smaller than a fingernail. Kinghelm KH-PB-22E75-WS Product Image 1. Appearance and Key Specifications The KH-PB-22E75-WS measures only 5.8 mm × 5.8 mm, with an overall height of 10.7 mm. It features a through-hole mounting design and a rectangular plunger-style actuator that provides a distinct tactile feel. As the most compact option in its product series, it is designed for high-density PCB layouts, delivering reliable operation even in extremely limited installation spaces. The switch features PC terminals, has no built-in illumination, and is supplied in bags. Its gross weight is approximately 0.43 g per unit. Key Specifications at a Glance: Circuit configuration: Double-pole double-throw (DPDT), six terminals Actuation mechanism: Momentary, self-resetting, non-shorting Total travel: 1.9 mm Mounting type: Through-hole Dimensions: 5.8 mm × 5.8 mm; 10.7 mm overall height Terminal style: PC terminals, without illumination Packaging: Through-hole component, bag-packed Gross weight: Approximately 0.43 g per unit 2. Construction and Materials: Durability in Every Detail According to the product datasheet, the KH-PB-22E75-WS features carefully selected materials to support durability and reliable operation. The base is made of nylon fiber and brass strip, with a gray-silver nickel-plated finish followed by silver plating. The cover is made of black polyoxymethylene (POM), while the actuator head uses POM and C5210R-EH phosphor bronze with a silver-coated surface. The internal spring is made of stainless-steel wire. This material combination helps provide actuator wear resistance and consistent tactile performance while supporting stable electrical contact and reliable spring return under repeated operation. The datasheet also identifies three critical dimensions with an asterisk (*) and specifies commonly used dimensional tolerances for through-hole mounting: ±0.1 mm for dimensions up to 1.5 mm, and ±0.2 mm for dimensions greater than 1.5 mm. 3. Why Choose the KH-PB-22E75-WS? Three Key Advantages 1. Compact Size Without Compromising Functionality With a footprint of just 5.8 mm, this switch is one of the most compact models in its series while retaining the full switching capability of a DPDT configuration. It is particularly suitable for portable devices and densely populated circuit boards where space is at a premium. 2. Reliable Momentary Operation The momentary, self-resetting mechanism automatically returns the actuator to its original position when released, eliminating the need to manually reset a latched switch. Its non-shorting switching design helps prevent unintended short circuits during switching, supporting safer circuit operation when used within its specified electrical ratings. 3. Convenient PCB Integration The through-hole design facilitates manual soldering and supports conventional through-hole assembly processes. The rigid PC terminals provide stable mechanical mounting, while the specified dimensional tolerances help engineers plan pad layouts and PCB footprints more accurately during the design stage. Kinghelm KH-PB-22E75-WS Specification 4. Applications and Selection Recommendations The KH-PB-22E75-WS is suitable for applications requiring dual-circuit switching in extremely limited spaces, including: Control panels for portable instruments User-interface buttons in consumer electronics Compact operating controls for industrial equipment Signal-switching circuits requiring reliable manual operation High-density electronic assemblies with strict space constraints When selecting this switch, engineers should pay attention to three key considerations: PCB footprint compatibility: Verify that the PCB hole pattern and pad dimensions match the PC terminal spacing and dimensions. Operating requirements: Confirm that the momentary, self-resetting mechanism matches the intended user interaction and switching frequency. Customization options: If an illuminated version or a different terminal configuration is required, contact the Kinghelm engineering team to discuss available options. 5. Conclusion The design quality of electronic components is often most evident in the smallest details. By combining an ultra-compact footprint, a six-pin DPDT configuration, and a momentary, self-resetting mechanism, the KH-PB-22E75-WS provides a practical balance of space efficiency and switching functionality for high-density PCBs. For consumer electronics and industrial applications that require a compact, dependable, and easy-to-integrate push button switch, the KH-PB-22E75-WS is well worth considering. About Kinghelm Kinghelm (www.kinghelm.net), as introduced by Song Shiqiang, provides a comprehensive range of products designed to meet the signal reception, transmission, connectivity, and protection requirements of smart hardware, particularly in RF and microwave applications. Its product portfolio includes antennas, connectors, jumper cables, plug-in connectors, and terminals, covering a wide range of applications and interface types, including USB Type-C, SMA, IPEX, and MCX RF connectors, HDMI connectors, RJ45 network connectors, automotive wiring harnesses, adapter cables, pin headers, female headers, terminals, GPS antennas, RF coaxial connectors, Wi-Fi antennas, BeiDou (BDS) antennas, embedded navigation and positioning antennas, 4G communication antennas, Bluetooth ceramic antennas, tactile switches, detector switches, slide switches, push button switches, micro switches, multifunction switches, illuminated switches, DIP switches, and toggle switches. Together with electronic components, sensors, TVS diodes, and other products supplied by Slkor (www.slkoric.com), Kinghelm serves tens of thousands of customers worldwide, providing a broad range of electronic components and supporting technical services. KH-PB-22E75-WSView Product Details

1. Product Overview: Compact Size, Reliable Performance for High-Density PCBs As PCB space becomes increasingly limited, the footprint of each component plays a critical role in determining how much functionality can be integrated into a circuit board. The Kinghelm KH-PB-22E65 is designed specifically for applications with stringent space constraints. With a compact footprint of just 5.8 mm × 5.8 mm and an overall installed height of 10.7 mm, this switch is one of the most compact options in its series of through-hole latching switches. It provides a reliable state-retention solution for high-density PCB layouts and applications with limited installation space. Kinghelm KH-PB-22E65 Product Image 2. Key Specifications Dimensions: 5.8 mm × 5.8 mm; overall height of 10.7 mm Circuit configuration: Double-pole, double-throw (DPDT), six-pin design Actuation mechanism: Latching; press once to lock in the ON state and press again to release to the OFF state Mounting type: Through-hole, through-board mounting Terminal type: PCB pins Actuator shape: Rectangular plunger Illumination: Non-illuminated Product weight: 0.41 g Packaging: Bag packaging 3. Six-Pin Latching Mechanism for Convenient State Retention Unlike conventional momentary switches, the KH-PB-22E65 features a latching mechanism. A single press locks the switch in the ON state without requiring continuous pressure. Pressing it again releases the latch and returns the switch to the OFF state. This mechanism is particularly suitable for applications that require the current operating state to be maintained, including power switching, mode selection, and function activation or deactivation. It simplifies control logic while providing clear, tactile feedback during operation. The six-pin DPDT configuration offers greater contact flexibility, allowing two separate circuits to be controlled independently. This enables multiple signal-switching functions to be integrated into a single compact switch, helping conserve valuable PCB space. 4. Structural Design and Manufacturing: Attention to Every Detail According to the engineering drawings, the KH-PB-22E65 uses carefully selected materials to balance durability, mechanical strength, and electrical performance. Actuator head: POM and phosphor bronze Switch cover: POM (polyoxymethylene), also known as acetal resin Main housing: Nylon fiber-reinforced construction with brass reinforcement Internal spring and worm mechanism: Stainless steel wire Surface finishes: Silver plating and nickel plating The switch features a non-shorting (break-before-make) contact design, helping prevent momentary short circuits between contacts during switching and improving circuit protection. Its compact, approximately 6 mm-class package and through-hole mounting design provide stable mechanical attachment and compatibility with conventional PCB assembly processes, including wave soldering, subject to the applicable process specifications. Kinghelm KH-PB-22E65 Specification 5. Quality Assurance: The Kinghelm Commitment Kinghelm is a high-tech enterprise with extensive experience in the interconnect and RF components industry. Its product portfolio includes antennas for BeiDou, GPS, Wi-Fi, and Bluetooth applications; IPEX, SMA, and FAKRA connectors; Type-C and HDMI connectors; pin headers and female headers; push button switches, slide switches, and microswitches; as well as industrial wiring harnesses and customized automotive and motorcycle cables. Kinghelm products serve a wide range of industries, including the Internet of Things (IoT), instrumentation, new energy, commercial aerospace, and smart cities. Mr. Song Shiqiang, founder of Kinghelm, has extensive experience in the electronic components industry and emphasizes rigorous quality control. The company maintains high standards in material selection, dimensional tolerance management, and reliability testing. The KH-PB-22E65 reflects this commitment to quality. Three critical dimensions identified in the engineering drawings are subject to key quality controls to help maintain consistency and stability in mass production, providing reliable component support for customers' end-product designs. 6. Typical Applications Thanks to its ultra-compact footprint, six-pin latching mechanism, and DPDT contact configuration, the Kinghelm KH-PB-22E65 is suitable for a variety of applications, including: Portable electronic devices Instrumentation and measurement equipment Industrial control panels Consumer electronics Power ON/OFF control Function selection and operating-mode switching For designs where PCB space is limited but reliable state retention is essential, this compact 5.8 mm switch is a practical option worth considering. About Kinghelm According to Mr. Song Shiqiang, to meet the signal and data reception, transmission, and protection requirements of smart hardware in RF and microwave applications, Kinghelm provides customers with a comprehensive range of complementary products, including antennas, connectors, jumper cables, plug-in connectors, and terminals. Its product portfolio includes USB Type-C, SMA, IPEX, and MCX RF connectors; HDMI connectors; RJ45 Ethernet connectors; automotive wiring harnesses; adapter cables; pin headers and female headers; terminals; GPS antennas; RF coaxial connectors; Wi-Fi antennas; BeiDou Navigation Satellite System (BDS) antennas; embedded navigation and positioning antennas; 4G communication antennas; Bluetooth ceramic antennas; and a wide range of electronic switches. Kinghelm's switch product range includes tactile switches, detection switches, slide switches, push button switches, microswitches, multifunction switches, illuminated switches, DIP switches, toggle switches, headphone jacks, DC power jacks, FPC connectors, USB connectors, waterproof USB connectors, sensing switches, vertical detection switches, through-hole detection switches, SMD-coded switches, limit switches, rotary coding switches, tactile push buttons, Type-C receptacles, joystick switches, five-way switches, scroll-wheel switches, and other specialized switching components. Representative Kinghelm KH-series models include KH-6X6X6H-STM, KH-IPEX-K501-29, KH-6X6X5H-STM, KH-6X6X5H-Z2J, KH-3216-H0209, KH-VH-PT3.96, and KH-SMA-P-8029. Kinghelm Electronics (Kinghelm, www.kinghelm.net), together with Slkor (www.slkoric.com), which offers electronic components, sensors, TVS diodes, and related products, provides electronic components and complementary technical support to tens of thousands of customers worldwide. KH-PB-22E65View Product Details

I. Product OverviewIn the design system of modern electronic equipment, push button switches are the most basic and core components for human-machine interaction. A tiny button carries the task of circuit on/off and function switching. Its stability, feel, and structural design directly affect the user experience and service life of the entire product. Kinghelm (Jinhangbiao), a well-known domestic manufacturer of RF and connector components, has launched the KH-PB-22E70-WS six-pin momentary push button switch. With its compact structure and reliable electrical performance, it has become a preferred component in consumer electronics, industrial control equipment, and smart hardware, providing convenient and stable control solutions for various PCB circuit designs. KH-PB-22E70-WS is a 5.8 x 5.8 x 13.5H mm through-hole plug-in push button switch. Each unit has a gross weight of only 0.49 g. It is small and lightweight, allowing installation and layout within limited circuit board space. The product is packaged in bags, making it suitable for mass production stocking and well suited to factory through-hole insertion assembly line requirements. Kinghelm KH-PB-22E70-WS product image. Kinghelm KH-PB-22E70-WS Product Image II. Core FeaturesThis switch adopts through-hole mounting and PC (polycarbonate) pins, making it sturdy and reliable. It is compatible with both manual soldering and wave soldering processes. After soldering, the pins are tightly combined with the PCB substrate, providing outstanding resistance to vibration and impact, making it suitable for equipment used in vibration environments. In terms of circuit structure, KH-PB-22E70-WS has a double-pole double-throw (DPDT) structure and can simultaneously control two independent circuits for synchronous switching. Compared with single-channel switches, the DPDT structure expands circuit design possibilities. In scenarios requiring synchronized switching of two signal paths or isolated control, a single button can complete the on/off operation of two circuits, simplifying PCB routing, reducing the number of components, and saving circuit board space. Button style: rectangular plunger, white keycap with black base, simple appearance, and clear and crisp pressing feedback. Locking type: momentary type, contacts close when pressed and automatically reset when released. Unlike a latching switch, it is suitable for jog or momentary trigger scenarios. Illuminated version: this model is non-illuminated, resulting in a simpler structure, lower power consumption, fewer LED failure points, and improved long-term reliability. III. Structural Design DetailsThe 5.8 mm x 5.8 mm base size is an industry-standard compact specification. The 13.5 mm total height leaves ample margin for equipment panel design, allowing the keycap to protrude from the enclosure for easy operation by users. The six-pin layout is the standard arrangement for DPDT circuits, and the pin spacing is standardized. Common PCB footprint libraries can be used directly. Hardware engineers do not need to redraw the footprint during schematic and PCB design, effectively shortening the R&D cycle. The internal spring contacts and contact points of the switch are made from strictly selected materials, ensuring stable electrical contact under repeated pressing, reducing common failures such as contact resistance drift and poor contact, and extending product service life. Kinghelm KH-PB-22E70-WS datasheet. IV. Application FieldsKH-PB-22E70-WS has a very wide range of applicable scenarios:Consumer electronics: momentary buttons for small appliance control panels, handheld test instruments, multimedia devices, and electronic toys, enabling function triggering and parameter adjustment.Industrial control: reset buttons for industrial control modules and trigger switches for test equipment.Smart hardware: the preferred debug button for MCU development boards and IoT terminals. Many R&D engineers choose it during prototype validation and mass production.Other fields: it is also suitable for medical monitoring, communications supporting equipment, and other devices with high requirements for component stability. Kinghelm KH-PB-22E70-WS Specification V. Brand and Quality AssuranceKinghelm (Jinhangbiao) relies on its modern production base in Luzhai, Guangxi, and intelligent flexible production lines to build end-to-end one-stop development capabilities covering product design, mold development, performance testing, and mass production. It has established a complete quality control system covering raw material screening, mold processing, and finished product inspection, enabling stable delivery with large volume, high consistency, and short lead times. Its KH-PB-22E70-WS push button switch undergoes multiple rounds of mechanical pressing tests and on/off performance testing before leaving the factory, fully ensuring the performance stability of each batch. Compared with imported similar devices, it has significant advantages in lead time, procurement cost, and localized technical support, comprehensively helping the domestic electronics manufacturing industry reduce costs and increase efficiency. VI. ConclusionThe value of electronic components is often hidden in the details. With its compact size, mature DPDT circuit structure, and convenient through-hole mounting solution, KH-PB-22E70-WS meets the momentary control needs of many products. As the consumer electronics and intelligent equipment industries continue to develop, domestic component brands such as Kinghelm continue to refine basic components and continuously optimize switch feel and structural reliability, providing stable and reliable domestic options for China's electronics industry. A tiny button may seem inconspicuous, but it is the starting point for interaction in countless electronic products. It completes circuit opening and closing in a tiny space and supports the stable operation of thousands of devices. About KinghelmKinghelm (www.kinghelm.net) is deeply engaged in the fields of microwave RF and connection technology and has built a full-category electronic component product matrix. Its core product lines include multi-standard communication antennas such as BeiDou/GPS antennas, Bluetooth antennas, and Wi-Fi antennas; connection devices such as RF jumper cables, signal connectors, board-to-board connectors, and socket connectors; and it also fully covers the entire series of switches and sockets, including tactile switches, detection switches, slide switches, push button switches, micro switches, multi-function switches, illuminated switches, DIP switches, toggle switches, sensing switches, limit switches, encoder switches, tactile push buttons, joystick switches, five-key switches, thumbwheel switches, as well as SMD detection switches, vertical detection switches, through-hole detection switches, SMD encoder switches, and other detailed specifications. It is also paired with supporting interface products such as earphone jacks, DC jacks, FPC connectors, USB connectors, waterproof USB, Type female sockets, and Type-C interfaces, forming a complete product ecosystem from signal transmission to on/off control. KH-PB-22E70-WSView Product Details

With the continuous advancement of automotive intelligence, vehicle communication, navigation, V2X and other functions have raised increasingly stringent requirements for the stability of RF signal transmission. As a core component in automotive RF links, FAKRA RF connectors are widely adopted in automotive GPS, vehicle multimedia, autonomous driving perception modules and other scenarios, thanks to outstanding anti-interference performance and consistent electrical properties. Kinghelm’s KH-FKRM-1007-04Z, a water-blue 90° board-mount FAKRA male antenna connector, is a high-performance connecting device specially designed for automotive RF signal transmission, delivering dependable RF connection solutions for various on-board devices. Kinghelm KH-FKRM-1007-04Z Product Image This KH-FKRM-1007-04Z RF socket is a through-hole board-mounted FAKRA connector with a 90° right-angle structure, also known as a 90° male header. The right-angle design brings prominent benefits: it enables vertical redirection of signal routes during PCB layout, effectively saving internal space of equipment and perfectly fitting the compact structure of automotive electronic control units. Electronic components inside vehicles are densely arranged with limited available space. This right-angle board socket reduces bending of signal traces and avoids cable interference, facilitating structural engineers to complete overall layout. It enjoys high compatibility in vehicle navigation, infotainment hosts, T-BOX telematics boxes and other products. In terms of appearance, this FAKRA connector is equipped with a signature water-blue plastic housing. Different housing colors of FAKRA connectors feature coding anti-misinsertion functions. Each color represents a unique code to prevent wrong mating during assembly, which would otherwise lead to communication failure. The water-blue coded version corresponds to a specific automotive RF channel. During mass production, workers can quickly identify interfaces by color, lowering assembly error rates and improving production efficiency for vehicle manufacturing. The plastic housing features temperature resistance and anti-aging properties, maintaining resistance to cracking and deformation under drastic temperature fluctuations inside vehicles for long-term service. For electrical performance, KH-FKRM-1007-04Z strictly follows standard RF specifications with a characteristic impedance of 50Ω, the most common impedance standard for RF transmission systems. It minimizes signal reflection and loss during transmission to guarantee intact RF signal delivery. Its operating frequency ranges from DC to 6GHz, a wide bandwidth fully capable of transmitting mainstream automotive RF signals including GPS, BeiDou positioning, 4G/5G automotive communication and vehicle Wi-Fi. Stable transmission is supported for both DC and high-frequency RF signals up to 6GHz, with controlled signal attenuation to ensure clear positioning and wireless communication signals and reduce packet loss or weak signal issues. Regarding environmental adaptability, the connector supports stable operation within a wide temperature range of -40℃ ~ +105℃. Vehicles operate across diverse environments: extreme cold in northern winters, high temperatures inside cabins after summer sunlight exposure, and thermal radiation near engine compartments all subject automotive electronics to sharp temperature changes. KH-FKRM-1007-04Z handles alternating high and low temperature conditions reliably. Its metal contacts avoid poor contact caused by thermal expansion and contraction, while insulating structures remain stable without leakage or signal crosstalk, meeting basic environmental resistance requirements for automotive-grade products. Adopting through-hole packaging, the pins of this product are designed for direct soldering onto PCB boards. The through-hole soldering process is mature and creates robust joints. Compared with SMT connectors, through-hole structures deliver superior mechanical vibration resistance. Vehicles are constantly exposed to vibration and bumps during driving. Through-hole soldering strengthens bonding between the connector and PCB, resisting stress induced by vehicle vibration and preventing pin detachment or cold solder joints, ensuring reliable connection under long-term vibrating conditions. The single unit weighs 5.175 grams. Its compact structure does not impose extra load on PCBs. Packed in bags, it suits bulk procurement, warehouse management and assembly line feeding for manufacturers. Kinghelm, a well-known domestic brand specializing in RF connectors, has built a complete quality control system for KH-FKRM-1007-04Z. Kinghelm has years of experience in developing and manufacturing RF adapters, antenna bases and terminal connectors. Its products are widely used in automotive electronics, IoT and communication equipment. The metal body of this FAKRA socket is made of premium alloy with gold plating. Gold-plated contact pins feature excellent conductivity and oxidation resistance, maintaining stable contact resistance after repeated mating cycles and lowering signal faults triggered by poor contact. Kinghelm KH-FKRM-1007-04Z Specification As intelligent vehicles keep iterating, the number of on-board RF channels keeps expanding from basic navigation antennas to multi-band cellular communication, Bluetooth and V2X antennas. Higher standards are required for the consistency and stability of RF connectors. KH-FKRM-1007-04Z integrates advantages in space layout, electrical performance, vibration resistance and easy anti-misplug assembly, matching the development demands of automotive electronics. Whether for automotive T-BOX, navigation hosts or smart cockpit multimedia modules, this connector helps build stable RF signal links and supports reliable operation of on-board wireless communication systems. In summary, Kinghelm KH-FKRM-1007-04Z water-blue 90° board-mount FAKRA male antenna socket is an RF connector tailored for automotive applications. With 50Ω impedance, DC~6GHz bandwidth, wide temperature range from -40℃ to +105℃, combined with 90° right-angle through-hole design and FAKRA color coding anti-misinsertion feature, it integrates superior electrical performance, mechanical reliability and assembly convenience. It serves as a cost-effective option for automotive RF connection schemes and provides solid hardware support for wireless communication systems in smart vehicles.About KinghlemKinghelm(www.kinghelm.net) is a specialized enterprise deeply rooted in microwave radio frequency and connection technologies. Our core product portfolio covers a full range of antennas including BDS/GPS antennas, Wi-Fi/Bluetooth/4G antennas, and built-in ceramic antennas, alongside Type-C, SMA, IPEX, MCX, HDMI connectors, RF coaxial connectors, signal connectors, and board-to-board connectors. We also supply supporting electronic components such as RF cables, adapter cables, automotive wiring harnesses, pin headers, terminals, connectors, and electronic switches. Backed by our R&D laboratory in Shenzhen and intelligent flexible production lines in Luzhai, Guangxi, we deliver one-stop capabilities spanning product design, mold development, performance testing, and mass production, enabling high-volume, high-consistency, and short-lead-time deliveries. Our products are widely adapted to new energy vehicles, smart terminals, industrial internet, smart cities, commercial aerospace, in-vehicle electronics, low-altitude UAVs and other scenarios, providing global customers with highly reliable signal connection and transmission solutions. KH-FKRM-1007-04ZView Product Details

Kinghelm KH-(868)-J505-JB 868 MHz external antenna with SMA connector Sub-GHz wireless technology is widely used in applications such as remote monitoring, industrial sensors, metering, and low-power IoT devices. In these systems, the antenna plays an important role in determining how effectively a device transmits and receives radio signals. Choosing the right antenna therefore requires more than matching a nominal frequency or selecting the smallest available component. For an 868 MHz design, engineers need to consider the operating bandwidth, available installation space, antenna structure, PCB ground plane, and the surrounding enclosure. Purchasing teams also need to verify mechanical compatibility, technical documentation, sample availability, and supply requirements before approving a component. This guide explains how to choose an 868 MHz antenna for Sub-GHz applications, from defining the initial design requirements to comparing antenna configurations and validating performance in the finished device. It also introduces the Kinghelm KH-(868)-J505-JB as a product candidate and uses a TE Connectivity antenna as an external reference for a different mounting approach. 1. Define the Frequency Band and Design Requirements The first step in antenna selection is to confirm the device's operating frequency range and the radio requirements in its target market. Although 433 MHz, 470 MHz, 868 MHz, and 915 MHz antennas all belong to the broader Sub-GHz category, they are designed for different frequency ranges and cannot automatically be used interchangeably. The intended application and deployment region help determine which band is appropriate. Once the band has been established, the antenna's bandwidth, mounting arrangement, and RF performance can be evaluated against the device requirements. Nominal Band Common Application Context What to Verify 433 MHz Short-range Sub-GHz links in several regions Exact allocation, required bandwidth, ground plane, and enclosure size 470 MHz Selected regional and application-specific systems Exact channel range and local radio requirements 868 MHz European Sub-GHz and LPWAN deployments Required operating bandwidth, regional limits, and matching performance 915 MHz Some regional ISM and LPWAN deployments Target band, antenna bandwidth, and regional compliance An antenna specified around 868 MHz should not automatically be assumed to cover 915 MHz effectively. Even antennas with similar physical appearances can have different resonance, impedance matching, and radiation characteristics. Before comparing antenna models, document four basic requirements: Operating frequency: Define the complete frequency range required by the radio system, rather than relying only on the nominal center frequency. Installation space: Record the available PCB area, keep-out region, enclosure dimensions, and permitted antenna height. Mounting configuration: Determine whether the product can accommodate a PCB-mounted, through-hole, or external antenna. RF performance: Establish the required bandwidth, impedance matching, radiation coverage, and communication performance. These requirements provide a practical starting point for narrowing the available options. With the frequency band and physical constraints established, the next step is to determine which antenna structure best fits the product design. 2. Compare PCB-Mounted, Helical and External Antenna Configurations Different antenna structures address different integration challenges. A compact PCB-mounted antenna may suit a space-constrained device, while a through-hole helical monopole or an external antenna may be more appropriate when the mechanical layout allows a different mounting arrangement. The choice should be based on the device's physical design and RF requirements rather than appearance alone. The following comparison can help engineers create an initial shortlist before reviewing individual product specifications. Application or Constraint Structures to Consider Potential Advantages Priority Checks Compact sensor or battery-powered node with no external antenna allowed PCB-mounted ceramic antenna or compact helical antenna Can keep the radiator within the product outline Keep-out area, ground plane, matching network, installed efficiency, and link budget Industrial controller or meter with room for a dedicated through-hole component Through-hole helical monopole Provides a defined mounting approach when the PCB and enclosure can accommodate its height Footprint, mounting height, grounding, component clearance, and mechanical retention Gateway or monitoring device where an external radiator is acceptable External whip or rubber antenna Allows more flexibility in positioning the radiator relative to internal components Connector, feed cable loss, antenna placement, polarization, and mounting strength Device with a suitable flat mounting surface and controlled antenna orientation Patch antenna designed for the target Sub-GHz band May suit products with a defined mounting plane and adequate space Exact operating band, ground plane, polarization, orientation, and manufacturer mounting guidance How to use this comparison: treat it as a way to narrow the mechanical options, not as a guarantee of RF performance. A compact antenna is not automatically the best choice if its installed efficiency or link margin is inadequate. Similarly, an external antenna may offer greater placement flexibility, but its connector and feed cable become part of the RF path. The terms ceramic, patch, chip, helical, and whip do not all describe the same type of classification. Some refer to materials or package forms, while others describe radiator configurations. For that reason, the exact construction and mounting instructions should always be checked in the manufacturer's documentation. PCB-Mounted Antennas A PCB-mounted antenna is worth evaluating when the enclosure is compact and an external radiator is not acceptable. However, its published gain and center frequency do not by themselves predict installed performance. PCB layout, ground plane, matching components, and nearby materials can shift resonance or reduce radiation efficiency. Follow the manufacturer's land pattern, ground connection, and keep-out guidance. Batteries, metal brackets, display frames, shields, and other conductive parts can affect antenna behavior if they are placed too close to the radiating section. For more background on integration considerations, see From Design to Application: Unveiling the Core Technologies of PCB Antennas. The article Patch vs. Chip vs. PCB Antenna for BLE Wearables also discusses compact-device integration, although its BLE context does not mean those antennas can be interchanged with an 868 MHz design. Helical Monopoles A helical monopole uses a coiled conductor to package a monopole radiator into a more compact form. A through-hole version may suit a design that can accommodate its pad layout, grounding, component clearance, and mounting height. Although helical antennas can reduce the physical length of a radiator, the actual performance depends on the specific design and installation conditions. Confirm the exact part number, footprint, grounding requirements, and mechanical drawing before changing a PCB layout. External Whip and Rubber Antennas An external whip or rubber antenna can place the radiator outside the enclosure, reducing its proximity to some internal detuning sources. This configuration may suit gateways, monitoring equipment, and other products where a larger profile is acceptable. Before selecting an external antenna, check the operating frequency, nominal impedance, published gain, polarization, mounting interface, and feed arrangement. Cable and connector losses should also be considered, and the mechanical support must be suitable for the intended installation. Once a suitable structure has been identified, the next step is to examine the RF design conditions that determine whether the antenna can perform as expected in the actual device. 3. Understand Wavelength, Ground Plane and Matching Choosing an antenna structure is only part of the selection process. Even an antenna designed for the correct frequency can perform differently when installed on a different PCB or inside a different enclosure. Wavelength, ground-plane design, impedance matching, and nearby materials all influence the final result. Wavelength at 868 MHz Wavelength provides a useful starting point for understanding antenna dimensions, but it does not determine the final physical size of every practical antenna. Loading, coil geometry, dielectric materials, nearby conductors, and the matching network all influence the design. For an initial estimate, the free-space wavelength can be calculated using the following formula: Wavelength (λ) in meters ≈ 300 ÷ Frequency (MHz) At 868 MHz: λ ≈ 300 ÷ 868 ≈ 0.346 m, or about 346 mm. Free-space quarter wavelength: λ/4 ≈ 86.4 mm. What the Quarter-Wavelength Estimate Means The 86.4 mm value is a free-space reference for a simple quarter-wave monopole, not a required physical length for every 868 MHz antenna. Helical, ceramic, and loaded designs can be shorter. Electrical length, matching, and installed performance are more meaningful than mechanical length alone. Ground Plane and PCB Layout The required ground-plane configuration depends on the antenna design. Manufacturer reference layouts are product-specific guidance, not universal PCB dimensions. A ground plane that differs from the reference setup can change the input impedance and radiation pattern. For example, TE Connectivity's documentation for the ANT-868-HETH uses a 38 × 84 mm reference ground plane. This is a reference configuration for evaluating that product, not a PCB-size requirement for every 868 MHz antenna. During PCB layout, engineers should: Follow the manufacturer's land pattern, ground connection, and keep-out requirements. Keep conductive objects and sensitive components away from the radiating section where the design guidance requires it. Place the feed and matching network according to the recommended RF layout. Allow room for tuning components if impedance adjustment may be required. Measure the antenna in the assembled product rather than relying only on a bare test board or simulation. For additional design guidance, see RF Antenna Design: A Practical Guide for Intermediate Engineers. Impedance Matching and Measurement A 50 Ω specification describes the nominal RF interface; it does not guarantee a 50 Ω input match after installation. The antenna, PCB, matching network, and surrounding materials must be treated as one RF system. A vector network analyzer (VNA) can be used to measure input matching across the required band. S11 and VSWR help identify resonance shifts and matching problems. For more detail, see How Can We Achieve 50-Ohm Impedance Matching in PCB Antenna Design?. However, a good S11 result does not guarantee high radiation efficiency or the expected communication range. Conductive losses, dielectric losses, the enclosure, antenna orientation, and the receiver environment all affect real-world performance. This is why electrical measurements need to be followed by validation in the finished device. 4. Evaluate 868 MHz Antenna Candidates for Different Integration Requirements After defining the operating band, selecting a suitable antenna structure, and reviewing the RF design constraints, the next step is to evaluate specific products. Product comparisons should consider mounting style, interface, published specifications, and integration requirements rather than relying on a single parameter. The Kinghelm KH-(868)-J505-JB is the featured Kinghelm product in this guide. The TE Connectivity ANT-868-HETH is included as an external reference for a different antenna configuration. These products use different physical structures and mounting methods, so the comparison is intended to clarify selection requirements rather than rank their performance directly. Candidate Form Factor / Interface Frequency Information Published RF Information Selection and Verification Points Kinghelm KH-(868)-J505-JB External rubber antenna with SMA interface Specified for 868 MHz 50 Ω impedance; published gain: 2 dBi; VSWR ≤ 2; rated power: 50 W Confirm the exact operating range, connector compatibility, mounting clearance, feed arrangement, and performance in the intended installation. Check the current official data sheet before final approval. TE Connectivity ANT-868-HETH Through-hole/tab-mounted helical monopole 862–870 MHz 50 Ω impedance. Refer to the current manufacturer's documentation for gain definitions, VSWR, and test conditions. Check the mechanical drawing, mounting footprint, reference ground plane, and RF performance under the intended PCB and enclosure conditions. How to Evaluate the Kinghelm KH-(868)-J505-JB The Kinghelm KH-(868)-J505-JB may be worth evaluating when the device can accommodate an external rubber antenna and its SMA interface. Before selecting it, confirm that the connector, mounting arrangement, available clearance, and intended operating band match the device requirements. Its published RF specifications provide an initial basis for screening, but they should not be treated as a guarantee of performance in every installation. The final result depends on the feed arrangement, surrounding conductive structures, antenna orientation, and deployment environment. Verify the current product documentation and evaluate the antenna under representative operating conditions. Using an External Reference Product The TE Connectivity ANT-868-HETH represents a different integration approach: a through-hole/tab-mounted helical monopole. It may be relevant when the PCB layout is designed for that mounting style and the required ground-plane configuration can be accommodated. Its footprint and mounting method should not be assumed to match the Kinghelm external SMA antenna. The TE product is included to illustrate how antenna structures can differ, not to imply that the two products are direct replacements. What to Check Before Replacing an Existing Antenna When evaluating an alternative antenna, engineers and purchasing teams should verify three areas before approving a change: Mechanical compatibility: connector, mounting method, available space, antenna height, and clearance. Electrical compatibility: operating frequency range, nominal impedance, feed arrangement, and matching requirements. System-level performance: matching, radiation performance, and communication performance in the final device. Also confirm that the current data sheet, mechanical drawing, and applicable compliance information correspond to the exact part number being quoted. Antennas with different structures or interfaces should not be treated as direct replacements without verification. After a candidate has passed the initial specification and compatibility checks, the next step is to verify its behavior in the complete device rather than relying on published figures alone. 5. Validate Antenna Performance in the Final Device Published specifications are useful for shortlisting antennas, but they cannot fully predict performance after installation. A metal enclosure, battery, display, cable, or mounting bracket may change impedance and radiation behavior. For this reason, antenna validation should be part of product development rather than a final check left until production approval. 1. Electrical Check Measure the operating band, S11, and VSWR with an appropriate RF setup, then compare the results with the antenna specification. If the resonance shifts or the match falls outside the required range, review the layout, matching network, and installation conditions. 2. Integration Check Repeat the measurement with the final PCB, ground plane, enclosure, battery, display, and major conductive parts installed. The assembled configuration is the relevant reference because the surrounding structure can influence antenna behavior. 3. Radiation and Link Test Assess radiated performance and the actual communication link in representative orientations and deployment conditions. A device that performs well in one orientation or test environment may behave differently in the intended installation. 4. Production Readiness Confirm the environmental, mechanical, and regulatory requirements against the product documentation before release. Where relevant, agree on acceptance criteria and retain the test results for future design or sourcing changes. These checks serve different purposes. A VNA measurement evaluates input matching, a radiated-performance test evaluates radiation behavior, and a link test checks communication under representative conditions. None can replace the others. Once the selected antenna has been checked against the mechanical design and RF requirements, the remaining task is to confirm that the product and its supply arrangements are suitable for the project. 6. Final 868 MHz Antenna Selection Checklist Before approving an antenna, review the following items with the engineering and purchasing teams. This helps ensure that the selected part meets both the device's technical requirements and the project's procurement needs. Checkpoint Question to Answer Frequency Does the antenna cover the complete required operating band? Form factor Does the mounting style fit the PCB and enclosure? Ground plane Does the actual layout follow the manufacturer's guidance? RF performance Have matching and radiated performance been evaluated? Replacement Have mechanical and electrical compatibility been verified? Sourcing documents Are the current data sheet, mechanical drawing, and relevant compliance documents available and consistent with the quoted part number? Project fit Have the target band, available space, mounting interface, and expected deployment conditions been shared with the supplier? Qualification Are samples, evaluation criteria, test ownership, and approval steps agreed before a production order? Supply readiness Have MOQ, lead time, order quantity, packaging, and change-notification expectations been confirmed with the supplier? Information to Prepare Before Requesting a Quote or Sample Preparing the following information can make product evaluation and supplier communication more efficient: Target frequency range and region of use. Available PCB and enclosure space, antenna height limit, and preferred mounting style. Required connector or feed interface, if applicable. Current antenna model and the reason for evaluating an alternative, if this is a replacement project. Expected application, installation environment, and defined RF or communication test criteria. Required quantity, sample timing, target production schedule, and documentation requirements. These details help establish whether a candidate is mechanically suitable and what information or testing is needed before approval. Final selection should still be based on current official documentation and validation in the finished device. For more information about the Kinghelm KH-(868)-J505-JB, review the product page and available technical documentation. If you need to discuss an 868 MHz antenna requirement, confirm product details, or evaluate suitability for a particular application, visit Contact Us on the Kinghelm website.

As in-vehicle infotainment, intelligent driving, and connected vehicle technologies continue to evolve rapidly, stable RF signal transmission has become an essential yet often overlooked foundation of automotive electrical performance. As a critical interconnection point between antennas and modules, PCB-mounted connectors must deliver reliable high-frequency performance while withstanding vibration and temperature variations. The Kinghelm KH-FKRM-1007-04C is a blue, right-angle FAKRA male connector designed to meet these requirements. Kinghelm KH-FKRM-1007-04C Product Image 1. Product Overview The KH-FKRM-1007-04C is a blue FAKRA RF antenna connector designed for PCB mounting. It features a right-angle, horizontal configuration, a through-hole mounting design, and bagged packaging. Its approximate gross weight is 4.94 g per piece. Compliant with the general FAKRA interface standard, the connector uses a color-coded identification system to enable quick and error-resistant mating. This model features blue coding, allowing it to mate accurately with the corresponding female connector while simplifying production-line assembly and maintenance identification. The connector covers a frequency range of DC to 6 GHz, features a characteristic impedance of 50 Ω, and operates at temperatures ranging from -40°C to +105°C. Its interface diameter is 7.5 mm, and its interface length is 9.53 mm, making it suitable for flexible placement on space-constrained automotive PCBs. 2. Key Features and Advantages 1. Wide Frequency Coverage and Low Signal Loss With a frequency range of DC to 6 GHz, the connector supports a broad range of RF applications, including 5G-connected vehicle systems, Wi-Fi 6/7, V2X communications, and GPS/GNSS. It is designed to facilitate low-loss RF transmission for high-speed data connectivity. 2. Excellent Mechanical Reliability The 90° right-angle design helps reduce stress concentration at the cable exit, contributing to improved mechanical reliability. The connector offers a locking retention force of ≥110 N and a mating cycle rating of ≥25 cycles, balancing secure assembly with resistance to repeated mating and unmating. 3. Wide Operating Temperature Range With an operating temperature range of -40°C to +105°C, the connector is suitable for a variety of automotive and outdoor operating environments, helping maintain stable electrical contact under extreme temperature variations. 4. Standardized Compatibility and Production-Friendly Design Following the FAKRA interface standard, the connector features blue color coding to prevent mismating. Its through-hole mounting design is compatible with automated soldering processes, supporting efficient production and consistent quality in volume manufacturing. 3. Typical Applications The KH-FKRM-1007-04C is suitable for RF interconnections between PCBs and various automotive components, including: In-vehicle infotainment head units T-Box and connected vehicle terminals Automotive antennas for GPS, 5G, and V2X applications It can also be used for PCB-level RF signal transmission in wireless communication modules for industrial equipment, security and surveillance systems, and base station antennas where reliability is essential. Kinghelm KH-FKRM-1007-04C Specification 4. Development Trends in FAKRA PCB-Mount Connectors FAKRA connectors are evolving beyond basic functional requirements toward enhanced standardization and higher-frequency performance. On the one hand, the growing adoption of 5G-Advanced (5G-A) and vehicle-to-everything (V2X) communications is driving higher performance requirements for PCB-mounted interfaces operating at GHz frequencies. This places increasingly stringent demands on impedance consistency, shielding effectiveness, and electromagnetic interference (EMI) control. On the other hand, mini-FAKRA and integrated interconnection solutions are gaining traction. These technologies enable higher connection density and faster locking mechanisms within smaller form factors, addressing the increasing PCB layout density requirements of automotive domain controllers. Meanwhile, the growing intelligence of modern vehicles is raising the bar for automotive-grade reliability, including resistance to temperature extremes, vibration, and corrosion. Color-coded identification and automated assembly processes are also becoming increasingly important for high-volume manufacturing. PCB-mounted products such as the KH-FKRM-1007-04C, which combine broad frequency coverage, mechanical reliability, and assembly convenience, reflect this direction of industry development. 5. Conclusion With its blue color coding, 90° horizontal configuration, and wide DC-to-6-GHz frequency coverage, the Kinghelm KH-FKRM-1007-04C provides a practical RF interconnection solution for automotive electronics and wireless communication applications. As FAKRA connectors continue to evolve toward higher frequencies, greater integration, and automotive-grade reliability, this connector helps engineers achieve stable, low-loss, and production-friendly RF connections within limited installation space. It is a valuable component for building reliable, high-speed connectivity architectures in next-generation vehicles. About Kinghelm Kinghelm(www.kinghelm.net) has nearly 20 years of experience in microwave and RF technology, supported by a core technical team with expertise from Tsinghua University and the University of Electronic Science and Technology of China. With comprehensive laboratory testing equipment, Kinghelm can independently develop new products and validate the performance of intelligent terminal products. Its intelligent, flexible manufacturing facility in Luzhai, Guangxi, provides strong support for large-volume production and delivery, enabling the company to supply reliable products and services to customers worldwide. The Kinghelm product portfolio covers BeiDou/GPS antennas, Bluetooth/Wi-Fi antennas, and a comprehensive range of RF jumper cables and interconnect assemblies. Popular models include KH-IPEX-K501-29, KH-SMA-K513-G, KH-TYPE-C-16P, KH-SMA-KE-Z, KH-SMA-KWE17-G, KH-MMCX-Z, KH-3216-A35, and KH-IPEX4-2020. In addition, Kinghelm offers a broad range of signal connectors, board-to-board connectors, PCB-mounted connectors, and switch products. The company also supports customized medical wire harnesses, automotive wire harnesses, non-standard antennas, and connectors. From technical drawings and mold development to testing and mass production, Kinghelm provides integrated manufacturing and development services to meet diverse customer requirements. KH-FKRM-1007-04CView Product Details

As the automotive industry continues to advance toward greater intelligence and connectivity, in-vehicle antenna systems, satellite navigation, and wireless communication systems are placing increasingly stringent demands on the performance and reliability of RF connectors. With standardized interfaces, stable RF transmission performance, and an established track record in automotive applications, FAKRA connectors are widely used in in-vehicle communications, navigation and positioning, and antenna signal transmission. To meet the requirements of PCB-side connections in automotive electronic equipment, Kinghelm introduces the KH-FKRM-1003-03Z, a 90° PCB-mount male FAKRA connector. Featuring a right-angle design, a 50Ω characteristic impedance, and a rated frequency range of DC to 6 GHz, this connector provides a compact and practical solution for automotive RF interconnection. Kinghelm KH-FKRM-1003-03Z Product Image 1. Kinghelm KH-FKRM-1003-03Z Product Specifications Brand: Kinghelm Model: KH-FKRM-1003-03Z Product Type: 90° PCB-Mount Male FAKRA Connector Color: Light Blue Mounting Type: Through-Hole Packaging: Bagged Gross Weight: 4.24 g Frequency Range: DC–6 GHz Characteristic Impedance: 50Ω Operating Temperature: -40°C to +105°C 2. Right-Angle Design Optimizes PCB Layout and Space Utilization The KH-FKRM-1003-03Z features a light blue insulating housing, metal connector components, and PCB-mount terminals. Its compact structure is designed to support space-efficient integration. The 90° right-angle configuration changes the direction of the RF interface, making it suitable for electronic equipment with limited installation space and helping optimize the layout between the connector and the cable. In automotive electronic control units, in-vehicle navigation devices, communication modules, and antenna-related circuits, connectors must meet electrical requirements while also accommodating PCB layouts, mechanical clearances, and assembly requirements. The right-angle PCB-mount design gives engineers greater flexibility when positioning interfaces and helps reduce the space constraints associated with straight connector configurations. The product uses a through-hole mounting design and is suitable for compatible through-hole soldering processes. During engineering design, selection and layout should take into account PCB thickness, pad dimensions, mounting height, and the mechanical structure of the target device. 3. DC–6 GHz Frequency Range for Diverse RF Connectivity Requirements RF performance is an important consideration when evaluating FAKRA connectors. The KH-FKRM-1003-03Z has a rated frequency range of DC to 6 GHz and a characteristic impedance of 50Ω, making it suitable for RF signal connections that meet its specified electrical performance requirements. A 50Ω characteristic impedance is commonly used in automotive RF systems. Maintaining proper impedance matching between the connector, RF cable, PCB transmission lines, and associated equipment helps reduce signal reflections and improve RF link performance. The rated DC–6 GHz frequency range provides a basis for integration into RF connectivity applications operating across different frequency bands. Depending on system requirements, the connector may be considered for in-vehicle antennas, GNSS navigation, radio reception, and other RF signal paths that fall within its applicable frequency range and electrical specifications. Actual suitability should be verified against parameters such as insertion loss, return loss, shielding effectiveness, and the measured performance of the complete transmission link. 4. Wide Operating Temperature Range for Automotive Electronics Automotive electronic equipment may be exposed to significant temperature variations, continuous vibration, and other demanding operating conditions. As a result, a connector's temperature tolerance and mechanical stability are important factors in product selection. The KH-FKRM-1003-03Z has a rated operating temperature range of -40°C to +105°C, providing a useful selection criterion for RF interconnection applications operating within these limits. With a gross weight of approximately 4.24 g and bagged packaging, the product also supports convenient storage, transportation, and production material management. In automotive electronic systems, connector reliability depends not only on the connector itself but also on soldering quality, PCB retention, cable strain relief, and the mechanical design of the complete assembly. Before mass production, it is recommended that the connector be evaluated under the intended operating conditions through temperature cycling, vibration, mechanical strength, and RF performance testing to verify compatibility with the overall system. Kinghelm KH-FKRM-1003-03Z Specification 5. Development Trends in FAKRA PCB-Mount Connectors: Miniaturization, Higher Frequencies, and Greater Reliability As smart cockpits, connected vehicles, and Advanced Driver Assistance Systems (ADAS) continue to evolve, the number of RF interfaces and the demand for signal transmission inside vehicles are increasing. This development is driving new requirements for FAKRA PCB-mount connectors. First, miniaturization and high-density integration are becoming increasingly important. As automotive electronic control units become more integrated, available PCB space continues to shrink. Connectors must therefore optimize their overall dimensions and mounting configurations while maintaining the required mechanical strength and electrical performance. Traditional FAKRA connectors, Mini-FAKRA, and High-Speed FAKRA (HFM) solutions each offer distinct advantages for different application scenarios. Second, higher operating frequencies place greater demands on connector design. With the development of in-vehicle communications and multi-band antenna systems, impedance matching, insertion loss, return loss, and electromagnetic shielding performance are receiving increasing attention. For products rated for operation up to 6 GHz, careful design of PCB pads, grounding structures, and RF transition regions can help achieve the desired electrical performance. Third, automotive-grade reliability and manufacturing consistency remain key competitive factors. Connector manufacturers must continue to optimize terminal processing, insulating materials, plating quality, and assembly processes while strengthening product testing and quality control to meet the long-term operational requirements of automotive electronics. Against this backdrop, conventional FAKRA products will continue to play an important role in established RF applications, while higher-density and higher-bandwidth interconnection solutions will provide additional options for future automotive electronic designs. 6. Conclusion From conventional in-vehicle antenna connections to an expanding range of automotive RF applications, FAKRA connectors remain an important component of automotive electronic interconnection systems. The Kinghelm KH-FKRM-1003-03Z 90° PCB-mount male FAKRA connector combines a right-angle configuration, a rated frequency range of DC to 6 GHz, a 50Ω characteristic impedance, and an operating temperature range of -40°C to +105°C. These specifications make it a product worth considering for automotive RF interconnection applications that meet its design and performance requirements. As automotive electronics continue to become more integrated and advanced, Kinghelm will continue to focus on connector structural design, electrical performance, reliability, and manufacturing processes, providing a broader range of interconnection solutions for in-vehicle communications, navigation and positioning, and RF connectivity applications. About Kinghelm Kinghelm(www.kinghelm.net) has years of experience in the connector and antenna industry. Its product portfolio includes Type-C, SMA, IPEX, MCX, and HDMI connectors; automotive wiring harnesses; adapter cables; pin headers; terminals; RF cables; various antennas; and RF coaxial connectors. Several models, including KH-IPEX-K501-29, KH-SMA-K513-G, KH-TYPE-C-16P, KH-SMA-KE-Z, KH-SMA-KWE17-G, KH-MMCX-Z, KH-3216-A35, and KH-IPEX4-2020, have maintained consistently strong sales volumes and gained market recognition as popular products. Supported by years of accumulated technical expertise, these products are designed to deliver stable signal transmission and adaptability to a range of operating environments. They can meet the standard interconnection requirements of applications across connected vehicles, the Internet of Things (IoT), smart hardware, industrial control, and other fields. Customers have provided positive feedback on their stable and practical performance, making them dependable options for supporting product development and project implementation. KH-FKRM-1003-03ZView Product Details

With the continuous development of automotive electronics, in-vehicle navigation, and wireless communication technologies, RF connectors are increasingly used in a wide range of electronic devices. Thanks to their standardized interfaces, easily identifiable housing designs, and reliable RF connections, FAKRA connectors have become common components in automotive RF systems. Today, we introduce the KH-FKRM-1003-03D, a purple, right-angle, male FAKRA PCB-mount connector developed by Kinghelm. Kinghelm KH-FKRM-1003-03D Product Image 1. Product Overview The KH-FKRM-1003-03D is a FAKRA PCB-mount connector designed for RF signal connections. It features a 90° right-angle configuration and through-hole mounting, making it suitable for electronic devices with specific interface orientation and PCB space requirements. The connector is purple, has a nominal operating frequency range of DC to 6 GHz, and features a characteristic impedance of 50Ω, providing a connection solution for compatible RF systems. The main specifications are listed below: Parameter Specification Brand Kinghelm Model KH-FKRM-1003-03D Product Type Right-Angle Male FAKRA PCB-Mount Connector Color Purple Mounting Type Through-Hole Frequency Range DC–6 GHz Characteristic Impedance 50Ω Operating Temperature -40°C to +105°C Interface Diameter 7.5 mm Interface Length/Height 14.35 mm Packaging Bag Gross Weight per Unit 4.28 g 2. What Is a FAKRA Connector? A FAKRA connector is an RF coaxial connector widely used in automotive electronics. Typical applications include in-vehicle navigation systems, automotive antennas, connected vehicle systems, and wireless communication equipment. Its design addresses not only RF signal transmission but also interface identification, mechanical misconnection prevention, and ease of assembly. A typical FAKRA connector consists of a center conductor, dielectric insulator, outer conductor, plastic housing, and mechanical keying structure. The center conductor carries the RF signal, while the dielectric maintains the relative positioning of the conductors. The outer conductor provides the return path and shielding. The plastic housing and keying structure help identify the interface type and reduce the risk of incorrect mating during assembly. FAKRA connectors are available in different housing colors and mechanical coding configurations. However, color is only an identification aid. Actual selection requires verification of the specific model, coding configuration, and mating interface. Compatibility should never be determined by color alone. 3. Key Features of the KH-FKRM-1003-03D 1. 90° Right-Angle Design for Optimized Installation The KH-FKRM-1003-03D features a 90° right-angle configuration that changes the direction of the RF interface. In electronic devices with limited internal space, where cables need to exit horizontally or PCB layouts are constrained, this design provides greater flexibility for installation. Design engineers can optimize the connector layout by considering enclosure openings, cable routing, and the positions of surrounding components. 2. DC–6 GHz Frequency Range for a Variety of RF Connection Requirements The connector has a nominal frequency range of DC to 6 GHz, providing a basis for evaluating its suitability for RF connections within the specified range. In practical applications, engineers should also verify parameters such as return loss and insertion loss at the target operating frequencies to ensure that the connector meets the system's signal transmission requirements. 3. 50Ω Characteristic Impedance for Common RF Systems A characteristic impedance of 50Ω is widely used in RF communication systems. A 50Ω connector helps maintain impedance matching with compatible coaxial cables, antennas, and communication modules, reducing the risk of signal reflections caused by impedance discontinuities. 4. Through-Hole Mounting for Convenient PCB Integration This model uses a through-hole mounting configuration and is designed for installation through corresponding PCB holes and soldering structures. The PCB-mount interface facilitates the integration of external RF connections into electronic modules, supporting equipment layout and assembly. The specific pad dimensions, pin arrangement, and installation tolerances should be verified against the official product drawings. 5. Wide Operating Temperature Range for Various Environments The specified operating temperature range is -40°C to +105°C, providing a reference for evaluating the connector in different temperature environments. For automotive electronics and other demanding applications, overall connection reliability should also be assessed against requirements for vibration, shock, humidity, and temperature cycling. 4. Applications of the KH-FKRM-1003-03D The Kinghelm KH-FKRM-1003-03D is a purple, right-angle male FAKRA coaxial connector designed for PCB mounting. With a nominal frequency range of DC to 6 GHz and a characteristic impedance of 50Ω, it can be evaluated for applications such as in-vehicle navigation, automotive antennas, vehicle communication systems, and RF modules, subject to interface compatibility and electrical performance requirements. 1. In-Vehicle Navigation Systems In in-vehicle navigation systems, this connector can be considered as a PCB-mounted interface for navigation-related RF modules requiring compatible antenna signal connections. Its PCB-mount configuration facilitates integration into navigation device circuit boards, while the 90° right-angle design helps accommodate enclosure space and interface orientation requirements. Before implementation, engineers should confirm that the navigation antenna's operating frequency and mating interface are compatible. 2. Automotive Antenna Systems Automotive antenna systems support the reception and transmission of navigation, wireless communication, and other RF signals. Depending on the antenna interface, RF specifications, and mechanical design requirements, the KH-FKRM-1003-03D may be evaluated as a PCB-mount connector for providing RF interconnections between antennas and electronic modules. 3. In-Vehicle Communication and Connected Vehicle Equipment Automotive communication controllers and connected vehicle devices typically require RF connections to compatible antennas or communication modules. With its 50Ω characteristic impedance and nominal frequency range of DC to 6 GHz, this connector can be evaluated for RF interconnection solutions that meet the relevant interface requirements. Its suitability for cellular communication or other wireless applications must be confirmed against the target frequency bands and actual electrical performance specifications. 4. In-Vehicle Infotainment Systems In-vehicle infotainment systems may integrate navigation, radio reception, and wireless communication functions, creating specific requirements for RF interface layout and assembly. The right-angle design of the KH-FKRM-1003-03D provides additional options for internal connector placement, while its through-hole mounting configuration supports PCB integration. During design, engineers should consider installation height, enclosure openings, and cable routing. 5. RF Modules and Related Electronic Equipment Beyond automotive electronics, this connector may also be evaluated for other electronic devices requiring a FAKRA interface, 50Ω RF transmission, and a right-angle PCB-mount connection. Because FAKRA connectors have specific mechanical structures and coding requirements, compatibility with the mating connector and RF performance across the target frequency range must be verified before use. Overall, the KH-FKRM-1003-03D is a candidate for design projects requiring a PCB-mounted FAKRA interface, a right-angle connection, and 50Ω RF transmission. Its suitability for a particular application should be confirmed using the official product specifications and actual test results. Kinghelm KH-FKRM-1003-03D Product Datasheet 5. Key Parameters to Consider When Selecting FAKRA Connectors When selecting a FAKRA connector, engineers should consider more than its appearance and interface type. Key parameters include frequency range, characteristic impedance, operating temperature, mechanical dimensions, and interface coding. First, the frequency range determines the operating bands for which the connector can be evaluated. For the KH-FKRM-1003-03D, its RF performance should be verified against the actual frequency requirements of the target application. Second, the 50Ω characteristic impedance should match that of the associated RF cables, antennas, and modules to minimize signal reflections caused by impedance mismatches. Mechanical dimensions directly affect PCB layout and equipment assembly. The KH-FKRM-1003-03D has an interface diameter of 7.5 mm and an interface length/height of 14.35 mm. Design engineers should consult the official dimensional drawing to verify installation space, pin positions, and PCB footprint requirements. The FAKRA coding configuration, mating interface structure, and male/female designation should also be confirmed to prevent assembly problems caused by incompatible interfaces. For automotive electronics and other demanding applications, additional factors such as vibration, shock, temperature cycling, and long-term operating conditions should be considered. If the project specifies requirements for return loss, insertion loss, shielding performance, or environmental certifications, engineers should obtain the relevant specifications and test reports from the supplier to ensure that the selected connector meets the application requirements. 6. Conclusion The Kinghelm KH-FKRM-1003-03D is a purple, right-angle male FAKRA coaxial connector designed for PCB mounting. It features a nominal frequency range of DC to 6 GHz, a characteristic impedance of 50Ω, and an operating temperature range of -40°C to +105°C. Its right-angle configuration and through-hole mounting design provide additional flexibility for RF interface layout and PCB integration. For in-vehicle navigation systems, automotive antennas, vehicle communication equipment, in-vehicle infotainment systems, and related RF electronic devices, this model can be considered as a candidate connector during the design and selection process. Before implementation, it is recommended that engineers consult the official product datasheet and mechanical drawings, verify mating interface compatibility, and evaluate RF performance under the intended operating conditions to achieve reliable RF connectivity. About Kinghelm Kinghelm (www.kinghelm.net) specializes in microwave RF and connectivity technologies. Its main product portfolio includes BeiDou/GPS antennas, Bluetooth antennas, Wi-Fi antennas, RF jumper cables, signal connectors, board-to-board connectors, sockets and pin headers, electronic switches, automotive wiring harnesses, adapter cables, pin headers, terminals, RF cables, GPS antennas, tactile switches, detection switches, toggle switches, push-button switches, micro switches, multifunction switches, illuminated switches, DIP switches, rocker switches, headphone jacks, DC power jacks, FPC connectors, USB connectors, waterproof USB connectors, and Type-C connectors. These products are widely used in consumer electronics, industrial control, smart vehicles, and IoT communications. Kinghelm's certifications include ISO 9001, RoHS, and REACH. The company provides standardized in-stock products as well as customized solutions, offering integrated product support to global customers seeking reliable connectivity and signal transmission solutions. KH-FKRM-1003-03DView Product Details

With the continuous development of automotive electronics, in-vehicle communications, and radio frequency (RF) technologies, RF connectors are playing an increasingly important role in signal transmission systems. As critical components in RF signal transmission paths, connectors can affect system stability through their structural design, impedance matching, operating frequency, and environmental adaptability. The KH-FKRM-1003-03C is a blue, 90° right-angle male FAKRA PCB-mount antenna connector introduced by Kinghelm. Featuring a right-angle design, this RF coaxial connector is suitable for electronic devices that require reliable RF signal connections while imposing certain constraints on installation space. Kinghelm KH-FKRM-1003-03C Product Image 1. Basic Product Information The KH-FKRM-1003-03C is an RF coaxial connector designed for PCB mounting. It features a FAKRA-series interface, a blue exterior, and a 90° right-angle male configuration. The connector uses a through-hole mounting design and is supplied in bag packaging. Its compact structure and clearly defined mounting configuration make it easier for engineers to select the appropriate connector based on interface layout and PCB design requirements. According to the product specifications, the connector has an interface diameter of 7.5 mm and an interface length or height of 14.35 mm. It features a nominal impedance of 50 Ω, a specified operating frequency of 6 GHz, and an operating temperature range of -40°C to +105°C. The product has a single connection port and an approximate gross weight of 4.44 g. These characteristics make it a candidate for applications requiring RF connectivity, space-efficient layouts, and operation across a specified temperature range. 2. Advantages of the 90° Right-Angle Design Compared with straight RF connectors, 90° right-angle connectors change the direction of the connection, allowing interfaces to be arranged horizontally or laterally. This can help optimize space utilization within electronic devices. In automotive electronic systems, communication modules, and other compact electronic products, the areas surrounding a PCB are often occupied by enclosures, wiring harnesses, and other electronic components. Connector orientation can therefore have a direct impact on the overall mechanical design. The KH-FKRM-1003-03C features a 90° right-angle configuration, providing an option for side-facing connections during PCB layout and equipment structural design. Proper use of right-angle connectors can help reduce spatial conflicts with surrounding components and facilitate cable routing. However, actual installation requirements should be evaluated comprehensively, taking into account PCB dimensions, cable bend radius, enclosure clearance, and connector mating orientation. 3. 50 Ω Impedance and 6 GHz Frequency Specification Impedance matching is an important factor affecting signal transmission quality in RF systems. The KH-FKRM-1003-03C has a nominal impedance of 50 Ω, making it a candidate for circuits and equipment that use a 50 Ω RF transmission system. When selecting this connector, engineers should ensure impedance compatibility among the connector, coaxial cable, antenna, and RF front-end circuitry. This helps minimize reflections and signal losses that may result from impedance discontinuities. The product's specified frequency is 6 GHz, providing a reference for RF connection designs operating within the applicable frequency range. However, actual high-frequency performance also depends on the interface structure, PCB soldering quality, transmission-line design, and mating connector. For high-frequency applications, engineers are advised to consult the product datasheet for insertion loss, return loss, voltage standing wave ratio (VSWR), and other relevant RF performance data. Appropriate testing and verification should be conducted to ensure that the connector meets the requirements of the intended system. 4. Operating Temperature and Environmental Conditions The KH-FKRM-1003-03C has an operating temperature range of -40°C to +105°C. This broad temperature range provides a useful reference for designing certain automotive and industrial electronic devices that must operate under varying thermal conditions. For equipment that must start at low temperatures, operate at elevated temperatures, or withstand substantial temperature fluctuations, the connector's specified operating temperature range is an important selection criterion. In practical applications, temperature is not the only environmental factor to consider. Vibration, shock, humidity, corrosion, and long-term connection reliability should also be evaluated. In automotive electronics applications in particular, connectors must satisfy electrical performance requirements while remaining compatible with the equipment's mechanical mounting arrangements and overall environmental protection design. Kinghelm KH-FKRM-1003-03C Specification 5. Typical Applications and Selection Recommendations With its FAKRA-series interface, nominal impedance of 50 Ω, and 90° right-angle configuration, the KH-FKRM-1003-03C can be considered for automotive RF connections, antenna interface designs, and the development of related communication equipment. FAKRA interfaces are widely used in automotive RF connectivity and can support antenna and communication signal connections in systems designed to comply with the applicable interface specifications. The blue exterior may also facilitate connector identification within certain systems. However, the meaning of specific color codes should be confirmed against the product specifications and the relevant system design standards. During the selection process, engineers should focus on the following factors: Mechanical compatibility: Verify that the male connector is compatible with the intended mating interface. Mounting requirements: Confirm that the PCB mounting method, pad layout, and soldering process are compatible with the connector's structure. Space constraints: Evaluate the available installation space, connector orientation, and cable routing requirements. Electrical performance: Check impedance requirements and the target operating frequency range. Environmental reliability: For applications requiring automotive-grade reliability, verify vibration resistance, mechanical durability, environmental performance, and relevant certification documentation. The connector should not be selected solely on the basis of its appearance or basic electrical parameters. A comprehensive evaluation of mechanical, electrical, and environmental requirements is essential. 6. Conclusion Overall, the Kinghelm KH-FKRM-1003-03C blue, 90° right-angle male FAKRA PCB-mount antenna connector is an RF coaxial connector featuring a through-hole mounting configuration. Its key specifications include a FAKRA-series interface, nominal impedance of 50 Ω, a specified frequency of 6 GHz, a 90° right-angle design, and an operating temperature range of -40°C to +105°C. These characteristics provide a useful reference for connector selection in automotive RF systems and related electronic equipment. In practical projects, appropriate connector selection affects not only PCB space utilization but also the overall performance of the RF signal path. By comprehensively evaluating interface compatibility, electrical parameters, mounting structure, and operating environment—and conducting the necessary tests against the product datasheet—engineers can better assess the suitability of the KH-FKRM-1003-03C for their RF connectivity applications. About Kinghelm Kinghelm (www.kinghelm.net) offers a wide range of electronic components and connectivity products, including Type-C, SMA, IPEX, MCX, and HDMI connectors; automotive wiring harnesses; adapter cables; pin headers; terminals; RF cables; antennas; GPS antennas; RF coaxial connectors; Wi-Fi antennas; BeiDou antennas; embedded antennas; 4G antennas; ceramic antennas; and other electronic components. Building on its extensive experience in the electronic components industry, Kinghelm continues to develop products designed to support reliable connectivity and environmental adaptability across a variety of applications. Its product portfolio serves consumer electronics, intelligent industrial control systems, in-vehicle equipment, and other electronic applications. Through its focus on manufacturing quality and flexible supporting solutions, Kinghelm has earned the long-term trust of customers across multiple industries, along with continued repeat business. KH-FKRM-1003-03CView Product Details

As consumer electronics continue to evolve toward smaller, lighter, and more highly integrated designs, PCB layout and connector selection face increasingly demanding requirements. Establishing multiple electrical connections within limited installation space while maintaining electrical performance and assembly compatibility has become an important consideration in electronic product design. The Kinghelm KH-2FH90-2X6P-H6.35 right-angle female header features a 2.0 mm pitch, a dual-row 12-position configuration, and a 90° right-angle design, providing an additional connector option for compact electronic devices. Kinghelm KH-2FH90-2X6P-H6.35 Product Image 1. Product Overview of the Kinghelm KH-2FH90-2X6P-H6.35 Right-Angle Female Header The KH-2FH90-2X6P-H6.35 is a dual-row, right-angle female header featuring a 2×6P configuration with a total of 12 receptacle positions. Both the contact pitch and row spacing are 2.0 mm. The product features square receptacle openings, a plastic housing height of 4 mm, and a 90° right-angle mounting configuration, making it suitable for PCB interface designs that require a perpendicular connection orientation. Compared with straight headers, right-angle female headers change the mounting and mating orientation of the connector, offering greater flexibility in PCB interface layout. When internal space is limited or the connection direction is constrained by the device structure, selecting an appropriate right-angle connector can help designers plan board-to-board connections and interface positions more effectively. 2. Key Product Specifications Parameter Specification Brand Kinghelm Model KH-2FH90-2X6P-H6.35 Product Type Dual-Row Right-Angle Female Header Contact Configuration 2×6P, 12 Positions Contact Pitch 2.0 mm Row Spacing 2.0 mm Receptacle Shape Square Mounting Style 90° Right-Angle Housing Height 4 mm Rated Current 1.5 A Operating Temperature Range -40°C to +105°C 3. 90° Right-Angle Design for Compact PCB Layouts In consumer electronics design, connector orientation affects PCB routing, interface positioning, and the placement of surrounding components. The Kinghelm KH-2FH90-2X6P-H6.35 features a 90° right-angle configuration and can be used in PCB interface designs that require a change in connection direction. This allows designers to position connections according to the internal structural requirements of the device. With a 2.0 mm contact pitch and a dual-row configuration, the connector provides 12 connection positions while helping control the footprint of the interface area. It can be evaluated for applications such as compact control boards, electronic functional modules, and internal board-to-board connections, depending on the specific circuit requirements. It is important to note that a right-angle configuration does not necessarily reduce the overall space required in every installation. The actual layout benefits depend on factors such as the connector's overall dimensions, mating plug, PCB pad design, mating direction, and available enclosure space. All relevant dimensions should be verified before selecting the connector. 4. Contact Materials and Electrical Performance The contact terminals of this model are made of brass and feature a flash-gold plating finish. Brass offers good manufacturability and is suitable for connector terminal production. Flash-gold plating can help improve the surface characteristics of the contact interface. Actual contact resistance, mating cycle life, and corrosion resistance should be evaluated based on test data provided by the manufacturer. The product has a rated current of 1.5 A and a specified operating temperature range of -40°C to +105°C, providing a reference for electrical connections under appropriate operating conditions. Designers should assess the actual load, ambient temperature, number of energized contacts, and thermal conditions to ensure that the connector meets the requirements of the intended application. Product documentation also references PA6T and Polyester (UL 94V-0) insulation material information. UL 94V-0 is a flammability classification for plastic materials. The exact material composition and scope of certification should be confirmed through the manufacturer's official documentation. Kinghelm KH-2FH90-2X6P-H6.35 Datasheet 5. Potential Applications in Consumer Electronics With its 2.0 mm pitch, dual-row 12-position configuration, and 90° right-angle design, the KH-2FH90-2X6P-H6.35 can serve as a connector option for certain compact electronic devices. For example, it may be evaluated for internal control PCBs, functional module interfaces, and multi-channel signal connections in consumer electronics, subject to installation space and electrical requirements. The connector may also be considered for compact instruments, embedded control devices, and other modular electronic systems where its dimensions and electrical specifications meet the application requirements. Suitability for a specific device must be verified against mechanical dimensions, mating connector compatibility, and reliability requirements. 6. Connector Selection and Soldering Considerations When selecting the Kinghelm KH-2FH90-2X6P-H6.35, designers should first confirm that the 2.0 mm contact pitch, 2.0 mm row spacing, dual-row 12-position configuration, and 90° mounting orientation match the PCB design. The connector's overall dimensions, mating height, compatible pin-header specifications, and available installation space should also be checked to prevent mating incompatibility or mechanical interference. During soldering, it is recommended to follow the processing temperature conditions specified by the manufacturer and validate the process according to the soldering equipment, process method, and actual temperature measurements. For mass-production projects, sample testing should be conducted to verify solder joint quality, mating performance, and electrical connectivity. 7. Conclusion The Kinghelm KH-2FH90-2X6P-H6.35 right-angle female header features a 2.0 mm pitch, a dual-row 12-position square-receptacle configuration, a 90° mounting orientation, a rated current of 1.5 A, and a specified operating temperature range of -40°C to +105°C. These structural characteristics provide additional options for PCB interface layout in consumer electronics and other compact electronic devices. In practical design applications, a comprehensive evaluation of installation space, mating compatibility, electrical load, and soldering processes can help improve connector selection and support efficient internal circuit interconnection and space planning. About Kinghelm Kinghelm, available at www.kinghelm.net, specializes in BeiDou/GPS dual-mode antennas, Bluetooth, Wi-Fi, Zigbee, NB-IoT, LoRa, UWB, and associated RF adapter cables. The company has developed three major product categories: board-to-wire connectors, PCB-mounted connectors, and electrical connectors and signal switches; automotive and motorcycle wiring harnesses; and specialized cables for industrial, medical, and scientific research applications. Kinghelm also supports customized, non-standard products. Its core product portfolio includes 4G antennas, ceramic antennas, RF connectors, pin headers, and related products. The company holds multiple invention patents and has obtained certifications and qualifications including ISO 9001, ISO 14001, Dun & Bradstreet registration, RoHS, and REACH compliance. IATF 16949 automotive quality management system certification, as well as UL and TÜV qualifications, are currently being pursued. KH-2FH90-2X6P-H6.35View Product Details

A buyer sends a photo of a round button on a control panel and asks for a quote on a "push button switch." The supplier replies with a 6 × 6 mm tactile switch designed for PCB mounting. The part does not match the requirement, leaving the buyer with a quote they cannot use. A second inquiry becomes necessary, adding time to the sourcing process.The problem is not necessarily how the products look, but how the terminology is interpreted. "Push button switch" describes a method of operation, while "tactile switch" identifies a type of switch designed to provide tactile feedback. Although tactile switches can fall within the broad functional meaning of push button switches, manufacturers and distributors may list them as separate product categories. This difference in terminology can lead to sourcing errors when a buyer specifies only "push button switch" without clarifying the mounting style or application.Many BOMs, datasheets, and product pages list these terms side by side. That is where misunderstandings can begin. The buyer may need a panel-mount button assembly, while the supplier interprets the same description as a small PCB tactile switch. What Is a Tactile Switch, and When Do Engineers Choose One? On a circuit board, a tactile switch usually serves one main purpose: to signal to a processor that a button has been pressed. In a normally open (NO) tactile switch, the contacts close when the actuator is pressed. In a momentary version, the contacts return to their normal open state when the actuator is released. The tactile feedback helps users recognize that the switch has been actuated. PCB tactile switches come in SMT and through-hole versions. Most are small enough to sit beside other components, with a low cap or actuator. Because they switch logic-level signals, they are rarely asked to carry a motor, a lamp, or a mains load. Typical places you will find them include remote controls, keyboards, wearables, appliance front panels, communication equipment, and instrument interfaces. For construction details and type breakdowns, see our guide to tactile switch types and specifications. What Does "Push Button Switch" Actually Mean? "Push button switch" is the wider term. Anything you operate by pressing a button fits under it, tactile switches included. In a sourcing conversation, though, the phrase usually points to the larger panel button: the one mounted through a hole in the enclosure and used to start, stop, or reset equipment. Those two uses of the same phrase are why quotes go wrong. A BOM line that only says "push button switch" can be filled by a 6 mm tact switch or a 22 mm panel button. Both are push buttons. Only one will fit the board or the panel. Panel buttons also raise questions that a tact switch never raises: is the action momentary or latching, what load does the contact carry, what cutout does the panel need, is there a lamp, and does the front need sealing? Those are not upgrades of a tact switch. They are a different product family. For the wider classification picture, read our article on how switching devices are classified. Where Do Tactile Switches and Panel Push Buttons Really Differ? The comparison only becomes useful when both sides are concrete. Below, the left column is the PCB tact switch most engineers mean. The right column is the panel or industrial button most buyers mean when they use the short phrase. What to Check Tactile Switch Panel Push Button Main role Signal input on a PCB Operator control on equipment Typical application Low-level signal input, reset and user-interface functions Equipment control, such as start, stop and reset Operation Commonly momentary Momentary or latching Mounting PCB, SMT or through-hole Panel cutout; some PCB versions exist Actuator and space Compact, low travel Larger cap, longer travel, behind-panel depth Operating feel Distinct click feedback Click, smooth, detent, or illuminated Confirm in datasheet Footprint, pinout, height, force, life Cutout, rating, contact form, cap, sealing There are multiple variants of push button switches. The confusion can happen not only between panel-mount push buttons and tactile switches, but also between latching PCB push switches and momentary tactile switches.Two rows cause most of the trouble. Current rating is not a family rule. You can find panel buttons rated for a few milliamps and tactile switches rated for low-level signals, but the numbers come from the specific part, not the label. Operation is the same story: momentary and latching both exist in the panel family, while the small PCB versions are usually momentary. Mounting style is one of the most useful ways to distinguish these products in a sourcing inquiry, although it is not an absolute rule. Typical PCB tactile switches are soldered directly to circuit boards, while industrial panel push buttons are usually secured through a cutout in the enclosure. However, PCB-mounted push buttons and larger tactile switches also exist. Always confirm the mounting method, dimensions, terminal arrangement, and mechanical drawing before selecting a replacement. What Should Buyers Check Before Ordering? The fastest way to avoid the mix-up is to make the BOM line more specific. These are the fields we ask for before quoting: Function: press-and-hold (momentary) or press-to-latch? Mounting: PCB pads or panel cutout? Include the drawing. Load: what voltage and current will the contacts switch? Actuator: cap height and shape, plus the space around it. Environment: dust, moisture, cleaning, or temperature limits? Life: how many operations, and under what test condition? Photos help, but they do not replace a drawing. A button that looks right from the front can have the wrong pin spacing, actuator height, or terminal type. If the part is going into an existing product, compare the sample against the current drawing before you approve it. If a tactile switch has already failed in the field, our troubleshooting guide for tactile switches covers the common causes. Conclusion "Push button switch" is a broad functional term describing a switch operated by pressing. A tactile switch is designed to provide tactile feedback and is commonly used as a compact PCB input component. Panel push buttons serve similar pressing functions but are typically selected for equipment control and panel mounting.For accurate sourcing, the BOM, drawing, and quotation should clearly specify the mounting method, operating function, electrical rating, and relevant dimensions. Clear specifications help prevent mismatches and reduce unnecessary back-and-forth during procurement.Need a sample or a specification check? Contact Kinghelm.

In modular equipment, slim enclosures, and stacked circuit board assemblies, connector footprint often becomes a bottleneck in PCB layout. While 2.54 mm-pitch female headers offer broad compatibility, engineers working with limited space often need a more compact alternative. Kinghelm's KH-2FH90-2X5P-H6.35 female header features a 2 mm pitch, a dual-row right-angle design, and square-hole contacts, providing a compact connectivity solution that balances high density with reliable performance. Key Product Specifications: Pin configuration: 2 × 5P Pitch: 2 mm Row spacing: 2 mm Contact hole type: Square hole Mating direction: Side-entry Mounting style: Right-angle Number of rows: Dual row Rated current: 1.5 A Insulator height: 4 mm Operating temperature range: -40°C to +105°C Kinghelm KH-2FH90-2X5P-H6.35 Product Image 2 mm Pitch and Dual-Row Design: High-Density Connectivity in Limited Space Traditional 2.54 mm-pitch female headers offer excellent versatility for standard applications. However, in space-constrained designs such as modular boards, control boards, and consumer electronics, their larger pin spacing requires a greater PCB footprint. With a 2 mm contact pitch and 2 mm row spacing, the KH-2FH90-2X5P-H6.35 can significantly reduce the connector's footprint compared with a 2.54 mm-pitch counterpart with the same number of contacts. This product features a 2 × 5P dual-row configuration, providing a total of 10 contact positions. The dual-row design not only increases connection density but also improves PCB layout efficiency. For applications requiring multiple connectors on a limited board area, a dual-row arrangement accommodates more contacts without increasing the connector's length, leaving additional space for surrounding components and routing. Right-Angle Design: A Key Solution for Height-Constrained Applications The KH-2FH90-2X5P-H6.35 features a 90-degree right-angle configuration, with its terminals extending horizontally from the side of the connector body. The main advantage of this design is the change in connection direction. Unlike vertical female headers, the right-angle structure allows a compatible male header or cable connection to extend horizontally along the PCB, helping reduce the space required in the vertical direction. In practical engineering applications, this design is particularly useful when internal device height is limited, such as in slim enclosures and stacked PCB assemblies, or when side-entry connections are required. A right-angle female header allows the connector and its mating component to extend horizontally, supporting more compact internal layouts. It also provides greater flexibility in PCB placement, helping engineers balance electrical connection requirements with enclosure dimensions and assembly constraints. Round-Hole vs. Square-Hole Contacts: How Contact Design Affects Performance When selecting female headers, the distinction between round-hole and square-hole contacts is an important consideration. Round-hole female headers typically use internal spring contacts that grip the inserted male pin through spring force, often creating two primary contact points. Square-hole female headers commonly use a multi-finger spring contact structure that grips the pin from multiple directions, potentially providing four contact points. These differences in contact geometry can affect electrical and mechanical performance. A well-designed multi-point contact system can distribute contact force more evenly and help maintain a stable connection. Actual contact resistance, vibration resistance, and insertion and withdrawal durability, however, depend on the contact material, plating, spring design, dimensional tolerances, and overall connector construction—not simply the number of contact points. The KH-2FH90-2X5P-H6.35 uses square-hole contacts. Within its compact 2 mm-pitch configuration, this contact structure is designed to provide secure pin engagement and reliable electrical connectivity. It is a practical option for applications where stable connections are important despite limited connector dimensions. Square-Hole Contacts and a 4 mm Insulator Height: Balancing Reliability and Compactness The product has an insulator height of 4 mm. This dimension helps maintain a compact connector profile while providing structural support for the connector body. When selecting a connector, engineers should evaluate the 4 mm insulator height in conjunction with PCB thickness, the height of nearby components, and the available space inside the enclosure. It is suitable for applications with certain vertical clearance constraints that do not require an ultra-low-profile connector. The combination of square-hole contacts and a 4 mm insulator height offers a practical balance between compact dimensions and connection reliability. Kinghelm KH-2FH90-2X5P-H6.35 Specification Electrical Performance and Temperature Compatibility The KH-2FH90-2X5P-H6.35 has a rated current of 1.5 A, making it suitable for many board-level signal connections and low- to moderate-power applications. Its operating temperature range of -40°C to +105°C supports use in a wide range of consumer electronics and general industrial control environments. For applications requiring higher current capacity, Kinghelm offers products in its 2.54 mm-pitch series with rated currents of up to 3 A, according to the relevant product specifications. Engineers should select the appropriate model based on actual load requirements and verify the applicable ratings for the specific connector. Typical Applications and Selection Recommendations Based on its key specifications and structural features, the KH-2FH90-2X5P-H6.35 is suitable for a range of applications, including: Compact control boards: Board-to-board connections where PCB space is limited. Modular equipment: Side-entry interfaces that support compact internal layouts. Consumer electronics: Internal connections in devices with restricted installation space. Industrial control modules: Compact signal connections where stable mating performance is required. Test and measurement equipment: Applications that use 2 mm-pitch right-angle female headers. Its square-hole contact design makes it worth considering for applications where secure pin engagement and connection stability are important. Actual suitability for high-vibration environments or applications requiring frequent mating cycles should be confirmed against the manufacturer's verified mechanical specifications and test data. When selecting a compatible connector, engineers should pay particular attention to two factors. First, ensure that the mating male header matches the female header's pitch, row spacing, pin configuration, contact geometry, and mating orientation. Second, verify that the rated current of 1.5 A meets the application's electrical requirements, taking into account contact resistance, operating conditions, and any applicable derating guidelines. From board-to-board connections on compact control boards to side-entry interfaces in industrial control modules, the KH-2FH90-2X5P-H6.35 combines a 2 mm pitch, a dual-row right-angle configuration, and square-hole contacts to deliver compact connectivity for space-constrained designs. For engineers seeking to balance PCB space efficiency with dependable electrical connections, it is a practical option within Kinghelm's female header product range. About Kinghelm Kinghelm (www.kinghelm.net) provides a broad portfolio of connectivity and RF solutions, serving industries such as communications, automotive electronics, industrial equipment, and the Internet of Things (IoT). Its product portfolio ranges from high-precision BeiDou navigation antennas to reliable signal interconnects for smart vehicles. The company's offerings include Type-C, SMA, IPEX, MCX, and HDMI connectors; automotive wiring harnesses; adapter cables; pin headers; terminals; RF cables; antennas; GPS antennas; RF coaxial connectors; Wi-Fi antennas; BeiDou antennas; embedded antennas; 4G antennas; ceramic antennas; and other electronic components. With more than 8,000 SKUs, Kinghelm offers a broad product selection designed to support customers throughout the product selection, development, and mass-production process, providing integrated connectivity and RF solutions for a variety of applications. KH-2FH90-2X5P-H6.35View Product Details