What is the core technology of aviation pin jack?

　　According to different types of materials made of the same specification of pin and socket connector, different contact resistance assessment indicators are specified, so its electrical parameters are also different.

　　Positive pressure the positive pressure of aviation pin and socket connector refers to the force generated by the contact surfaces at the same time perpendicular to the contact surface. With the increase of normal pressure, the number and area of contact micro points are also gradually increased, and the contact micro points transition from elastic deformation to plastic deformation. Because the concentrated resistance gradually decreases, the contact resistance is reduced. The normal contact pressure is mainly determined by the geometry and material properties of the connector.

　　First, the surface condition of aviation pin and socket connector is as follows

　　1. Due to dust, rosin, oil, etc., the loose surface film is formed by mechanical adhesion and deposition on the contact surface. This layer of surface film is especially easy to be embedded in the micro pits of the contact surface because of the particles, which reduces the contact area, enhances the contact resistance, and is particularly unstable.

　　2. Because of the fouling film formed by physical adsorption and chemical adsorption, the surface of aviation pin socket is mainly chemisorption, which is produced with electron migration after physical adsorption. Therefore, for some products with high reliability requirements, such as aerospace aviation pin jack, there must be clean and concise assembly production environment conditions, perfect cleaning process and necessary structural sealing measures, and the user must have good storage and operation environment conditions.

　　Second, the electrical properties of aviation pin jack connectors are as follows

　　1. When the applied voltage reaches a certain closed value, the film of the connector will be broken down, and the contact resistance will drop rapidly. However, the thermal effect can accelerate the chemical reaction in the region near the film, which has a certain repair effect on the film. So the resistance is nonlinear. In the vicinity of the threshold voltage, the small fluctuation of the voltage drop will cause the current to change in the range of 20 or dozens of times.

　　2. When the current exceeds a certain value, the Joule heat produced by electrifying the tiny point on the interface of aviation pin jack connector will soften or melt the metal, which will affect the concentrated resistance and then reduce the contact resistance.

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