The contact impedance of an electronic connector during its service life to reduce the loss or attenuation of signals and energy in the transmission process; this parameter of contact impedance is designed to reduce the loss or attenuation of signals and energy in the transmission process, and the current will be like a water current, the lower the resistance, the less the loss and attenuation of energy. In terms of the connector contact, the factors affecting the size of its impedance are positive force (for elastic contact structure), the contact environment, such as the surface roughness of the terminals (conductors), surface treatment (such as plating of the metal properties and densification), terminals and terminals (or other conductors) combined with the way (is the weld or riveted or elastic contact, etc.). Test Methods: 1. Test current/voltage 100mA@20mV, no load on the connector (connection system) under test. 2. 2. The test current is low in order to avoid the contact impedance being affected by the thermoelectric effect of the terminals (conductors). 3. 3. the test voltage is low voltage is to avoid the terminal (conductor) between the contact interface insulation film is broken and melting. Specification requirements: general requirements 50m (initial); 100m (final), that is, after the life test or environmental testing.
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