2 pin 3TKA02FW 7283-5845 Automotive Air Temperature Connector For Ducati 1.2 Series

3) high temperature 

High temperature will destroy the insulating material, resulting in a decrease in insulation resistance and withstand voltage performance. For metal shells, high temperature can cause the contacts to lose elasticity, accelerate oxidation and cause coating deterioration. For example, the environment-resistant quick-disconnect electrical connector series 2 produced according to GJB598, the insulation resistance should not be less than 5000MΩ at 25°C, and should be reduced to not less than 500MΩ at a high temperature of 200°C. The electrical connection design considers the current-carrying temperature rise. Under working conditions, the rated working temperature of the insulating material shall not be exceeded.

4) Humidity

The humid environment causes the absorption and diffusion of water vapor on the surface of the insulator, which easily reduces the insulation resistance to below the MΩ level. Long-term exposure to high-temperature environments will cause physical deformation, decomposition, and release of products from the insulator, resulting in breathing effects, electrolytic corrosion, and cracks. For example, for ribbon cable electrical connectors produced according to GJB2281, the insulation resistance value under standard atmospheric conditions should not be less than 5000 MΩ, and the insulation resistance after the relative humidity is 90% to 95%, and the temperature is 40 ± 2 ° C for 96 hours. The resistance drops to not less than 1000 MΩ. 

5) Defaced

The cleanliness of the interior and surface of the insulator has a great influence on the insulation resistance. Impurities are mixed in the powder used for injection molding the insulator or the glue used to glue the upper and lower insulation mounting plates, or metal shavings and terminals are left due to repeated plugging and pulling wear. When soldering, the flux residue penetrates into the surface of the insulator, which will significantly reduce the insulation resistance. For example, the circular electrical connector produced by a factory found that the insulation resistance between the contact parts of a product was very low during the delivery test of the finished product, only 20MΩ was unqualified. After anatomical analysis, it was found that the reason was due to the powder used for injection molding insulators. There are impurities mixed in, and the batch of products has to be scrapped in the end.

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