Considerations for key selection parameters of connectors

Issuing time:2020-05-12 17:15

(A) Electrical Performance Parameters

Contact Resistance: Contact resistance directly affects the efficiency of signal and power transmission. Excessively high contact resistance can lead to increased energy loss, signal attenuation, and even overheating of the equipment. In signal transmission scenarios, connectors with low and stable contact resistance should be selected to ensure signal integrity. In power transmission scenarios, low contact resistance helps reduce power loss and improve system efficiency.

Insulation Resistance: Insulation resistance measures the ability of the connector's insulation materials to prevent current leakage. A decrease in insulation resistance may lead to short - circuit failures, damage to equipment, or safety accidents. In environments with high voltages and high humidity, the requirements for the insulation resistance of connectors are even higher. Regular detection and maintenance are required to ensure good insulation performance.

Rated Voltage and Current: Select connectors with rated voltages and currents greater than the operating voltages and currents according to the actual voltage and current in the usage scenarios. In power transmission scenarios, if the rated current of the connector is insufficient, it may cause the connector to overheat and burn out. In signal transmission scenarios, excessively high voltages may break down the insulation layer of the connector and affect signal transmission.

(B) Mechanical Performance Parameters

Insertion and Extraction Force: The insertion and extraction force refers to the force required when inserting and removing the connector. Excessive insertion and extraction force will increase the difficulty of operation and may even damage the connector and the equipment interface. Too small a force may result in an insecure connection and easy loosening. In scenarios with frequent plugging and unplugging, such as testing equipment and replaceable modules, connectors with moderate insertion and extraction force and a good tactile feel should be selected to improve the convenience and reliability of operation.

Mechanical Life: Mechanical life indicates the number of plugging and unplugging times that a connector can withstand under normal usage conditions. For applications that require frequent plugging and unplugging, such as the hard disk interfaces of data center servers, connectors with a long mechanical life should be selected to reduce maintenance and replacement costs. Generally, high-quality connectors can have a mechanical life of several thousand times or even more.

Vibration and Shock Resistance: In environments with large vibrations and shocks, the vibration and shock resistance of connectors is crucial. Test by simulating actual vibration and shock conditions, and select connectors that can meet the requirements. For example, in the automotive and aerospace fields, connectors with locking devices and reinforced structures are used to enhance their vibration and shock resistance.

Protection Level: The protection level (IP code) is used to indicate the connector's ability to prevent dust and water ingress. For example, IP67 means that the connector is completely protected against dust ingress and can be immersed in water for a certain period without causing harmful effects. For outdoor equipment, humid environments, or industrial sites with a lot of dust, connectors with a high protection level should be selected to ensure their normal operation.

Operating Temperature Range: Different connectors have different operating temperature ranges. In high-temperature environments (such as automotive engine compartments, near industrial furnaces), high-temperature-resistant connectors should be selected. Their materials should have good thermal stability and mechanical properties. In low-temperature environments (such as polar scientific research equipment, refrigeration equipment), connectors should be able to maintain flexibility and electrical performance at low temperatures to avoid material embrittlement and performance degradation caused by excessively low temperatures.

Corrosion Resistance: In coastal areas, the chemical industry, and other environments, connectors are vulnerable to the erosion of salt spray and chemical corrosive substances. At this time, connectors made of corrosion-resistant materials (such as stainless steel, engineering plastics) and with surface treatment processes (such as nickel plating, tin plating) should be selected to improve their corrosion resistance and extend their service life.