KH-2FH90-2X5P-H6.35 Dual-Row Right-Angle Female Header: A High-Density PCB Connectivity Solution

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.

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