Electronic connectors are characterized by their pin arrangement, physical structure and size; Contact resistance, insulation between pins, robustness and vibration resistance; Resistance to water or other pollutants, pressure resistance; Reliability, easy to connect and disconnect. They can be locked to prevent insertion in the wrong direction, connect the wrong pins to each other, and have a locking mechanism to ensure that they are completely inserted and cannot be loosened or dropped. Some connectors are designed such that some pins contact before others when inserted, and are disconnected first when disconnected. This can protect the circuit that is usually connected to the power supply, such as first connecting the safety ground and correctly sequencing the connections in the heat exchange application.
Some consumers hope that the connector can be easily recognized visually, can be assembled quickly, and is simple to operate and cheap. In some cases, the equipment manufacturer may choose the connector specially because it is not compatible with connectors from other sources, so it can control the connectors that may be connected. No connector has all ideal properties, and the type diffusion of connectors reflects different requirements. Fretting is a common failure mode in electronic connectors, which is not specially designed to prevent it.
