What issues should you pay attention to when purchasing RF coaxial connectors?

Choosing the right connector for a specific application or project is not as easy as it seems. There are many types of connectors, from RF coaxial connectors to PCB connectors, insulation displacement or IDC connectors to ring connectors.

Each different type of connector has its own function, and choosing the right type is key, whether it is a PCB connector, an IDC connector, an RF coaxial connector, or whatever type is needed.

The purpose of this article is to provide some important tips to help you select the appropriate connector for a given circuit or device.

There needs to be a way to choose the right connector - whether it's a power connector, a PCB connector, an IDC connector, or something else. In order to choose the right type, you also need to make the right decision.

How to choose a connector

When selecting the appropriate connector for a specific circuit or a specific location in a system, a useful sequence can be considered.

Although manufacturers provide detailed specifications for their products, it is still impossible to select the best option for a circuit or system, and using a logic approach can help a lot.

Connector application: The first step in selecting a connector or connectors may be to define its purpose. Whether connections are required such as panels, cables to circuit boards, cables to chassis, etc. will determine many of its characteristics.

Consider this: The level of current required by a connector affects many overall characteristics. Low current connectors are generally very different from connectors that carry high currents. The current that a connector needs to carry is one of the most important factors in its selection. If high current levels are a concern, certain types of connectors are appropriate, and these connectors are usually larger, although smaller connectors may be used if lower current levels are required.

Take a look at the space and shape required: The space and shape available for connectors also plays an important role in the decision-making process and often controls the type of connector used.

Environmental requirements: Environmental requirements play an important role in the selection of any connector. Many connectors are only suitable for good environments, while others may need to work in poor conditions such as temperature, humidity, vibration, etc. In some cases, it may be necessary to seal the connector to reduce the ingress of moisture. Sometimes, if you want to use water to waterproof, not just water to waterproof. This must be included as part of the decision-making process.

Some connectors are unlikely to withstand considerable vibration, but those that do must have restraints, locking mechanisms, or methods to ensure that they will not separate. Push-on connectors may be fine for use in an office or lab, but things that are typically operated and moved within vehicles need to connect securely and maintain a solid fit. Also remember that the equipment will vibrate during transportation, and connections should be selected and remembered.

Solution: Most connectors have some form or optional strain relief. Stress relief is especially necessary when vibration is likely to occur or when connectors need to be connected and disconnected.

EMC and filtration: In some cases, filtration is necessary, especially for EMC requirements. Some connections have the option of additional filtering, or they are already included.

Voltage Issues: You should always check the voltage rating of a connector, especially when using high voltages. In some cases, it may be necessary to leave floating pins around any high voltage carrying pins.

Whether you are choosing a power connector, a PCB connector, or an IDC connector, it is always useful to use a logical approach to selecting the correct connector for a given project. With the wide variety of connectors available today, the choice can be confusing, and providing a way to provide a sound decision-making approach would be very helpful.