What is the failure analysis of military circular electrical connectors?

ONE. How is the failure analysis of military circular electrical connectors? ① Temperature resistance of the current military connectors higher operating temperature of 200 ℃ (except for a few high-temperature special connectors), lower temperature of -65 ℃. As the connector works, the current generates heat at the contact point, resulting in temperature rise, so it is generally believed that the operating temperature should be equal to the ambient temperature and the sum of the temperature rise of the contact point. In some specifications, it is specified that the connector in the rated operating current allowable higher temperature rise. ② Resistant to moisture moisture intrusion will affect the connection h insulation properties, and corrosion of metal parts. ③ salt spray resistant connectors in the environment containing moisture and salt work, its metal structural parts, contact parts surface treatment layer may produce galvanic corrosion, affecting the physical and electrical properties of the connector. ④ vibration and shock resistance vibration and shock is an important performance of the electrical connector, in special applications such as aviation and aerospace, railroads and road transportation is particularly important, it is an important indicator to test the mechanical structure of the electrical connector and the reliability of the electrical contact of the ruggedness. ⑤ other environmental performance according to the requirements of the use of other environmental performance of the electrical connector sealing (air leakage, liquid pressure), liquid impregnation (on the specific liquid resistance to abusive chemical ability), low air pressure and so on.

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