Common environmental properties of electronic connectors include temperature resistance, humidity resistance, salt spray resistance, vibration resistance and impact resistance.
The current rated working temperature of electronic connectors is -65ºC~200ºC. When the connector is working, the current generates heat at the contact point, resulting in a temperature rise, so it is generally believed that the working temperature should be equal to the sum of the ambient temperature and the contact temperature. In some specifications, the maximum temperature rise allowed by the connector under the rated operating current is clearly specified.
The intrusion of moisture will affect the insulation performance of electronic connectors and rust metal parts. The constant humidity test conditions are 90%-95% relative humidity (up to 98% according to product specifications), temperature +40±20ºC, and the test time is at least 96h according to product specifications. The alternating damp heat test is more stringent.
③Salt spray resistance
When electronic connectors work in an environment containing moisture and salt, the surface treatment layers of their metal structures and contacts may produce galvanic corrosion, which affects the physical and electrical properties of the connector. In order to evaluate the ability of electrical connectors to withstand this environment, a salt spray test is specified. It is to hang the connector in a temperature-controlled test box and spray out the sodium chloride solution with a specified concentration with compressed air to form a salt fog atmosphere. The exposure time is specified by the product specification and is at least 48h.
④Vibration and shock resistance
Vibration and shock resistance is an important performance of electrical connectors. It is particularly important in special application environments such as aviation and aerospace, railway and road transportation. It is an important indicator for testing the robustness of electrical connectors’ mechanical structure and electrical contact reliability . . There are clear regulations in the relevant test methods. In the shock test, the peak acceleration, duration and shock pulse waveform, as well as the interruption time of electrical continuity should be specified.
⑤Other environmental performance
According to usage requirements, other environmental properties of electrical connectors include airtightness (air leakage, liquid pressure), liquid immersion (resistance to specific liquids) and low air pressure.
Post time: Nov-11-2020