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Introduction to the performance of the spring charging needle.Elastic contact

source:Industry News    Popular:pogo pin for moilble phone     release time:2022-02-18 09:43:32     Article author:sznbone

  

Introduction to the performance of the spring charging needle.Elastic contact(图1)

  1. High temperature resistance of spring charging needle

  At present, the maximum working temperature of the spring charging needle is 240°C, and the minimum temperature is -65°C. Since the current generates heat at the contact point when the connector is working, resulting in a temperature rise, it is generally believed that the operating temperature should be equal to the sum of the ambient temperature and the temperature rise of the contact point. In some specifications, the maximum temperature rise allowed by the connector at the rated operating current is clearly specified.

  2. Moisture resistance of spring charging needle

  The intrusion of moisture can affect the insulation performance of the connector and corrode metal parts. The constant damp heat test conditions are relative humidity 90%~95%, temperature +40±20℃, and the test time shall be at least 96 hours according to the product regulations. The alternating damp heat test is more severe.

  3. Salt spray resistance of spring charging needle

  When the spring charging pin works in an environment containing moisture and salt, its metal structure and contact surface treatment layer may produce galvanic corrosion, which affects the physical and electrical properties of the connector. To evaluate the ability of electrical connectors to withstand this environment, the salt spray test is specified. It is to hang the connector in a temperature-controlled test box, and spray the sodium chloride solution with the specified concentration with compressed air to form a salt fog atmosphere. The exposure time is specified by the product specification, at least 48 hours.

  4. Vibration and shock resistance of spring charging needles

  Vibration and shock resistance are important properties of electrical connectors, especially in special application environments such as aviation and aerospace, railway and road transportation. . There are clear provisions in the relevant test methods. The shock test shall specify the peak acceleration, duration and shock pulse shape, as well as the time of interruption of electrical continuity.


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