Environmental impact on the use of connectors

According to usage requirements: other environmental functions of electrical connectors include airtightness, liquid immersion, low air pressure, etc. In some specifications, the maximum temperature rise allowed for the connector under the rated operating current is clearly defined. The premise of the constant damp heat test is the relative humidity of 90%~95% and the temperature of +40±20℃. The test time is determined by the product, at least 96 hours. Because when the connector is working, the current generates heat at the contact point, resulting in a temperature rise, so it is generally assumed that the working temperature should be the sum of the ambient temperature and the temperature rise of the contact point. In the impact test, the peak acceleration, duration and impact pulse waveform, as well as the time of electrical continuity shall be defined.

Vibration and shock: Vibration and shock resistance is an important function of electrical connectors. It is particularly important in special application environments such as aviation and aerospace, railway and road transportation. It is the robustness and electrical contact reliability of the mechanical structure of electrical connectors for maintenance An important indicator of sex. In order to evaluate the ability of the electrical connector to withstand this environment, a salt spray test is defined. It is to hang the connector in a temperature-controlled test box, and spray out a sodium chloride solution with a defined concentration with compressed air to form a salt fog atmosphere. The exposure time is defined by the product specification, and is at least 48 hours.

Temperature resistance: The current maximum working temperature of the connector is 200℃, and the lowest temperature is -65℃.

Salt spray resistance: When the connector works in an environment containing moisture and salt, the metal structure and the surface treatment layer of the contact may produce electrochemical corrosion, which will affect the physical and electrical functions of the connector.

Humidity resistance: The intrusion of moisture will affect the insulation function of the connection h and rust metal parts.

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