What are the factors that affect the current capacity of power connectors?

What are the factors that affect the current capacity of a power connector? Connectors are an integral part of electronic equipment, and their role is simple: to bridge the gap between blocked or isolated circuits in a circuit so that current can flow and the circuit can perform its intended function. Connectors come in a wide variety of forms and configurations, with connectors for different applications, frequencies, powers, and application environments. For example, the connectors used for headlights and hard disk drives are very different from those used to ignite rockets. However, regardless of the type of connector, there is a need to ensure that the current flows smoothly, continuously and reliably.

First, the use of electrical connector contact material factors electrical connectors will develop different contact resistance assessment indicators, so the technical conditions of the power connector will also be based on different materials to develop different specifications of the plug and contacts. Second, the positive pressure of the electrical connector and its use factors The positive pressure of the power connector is the force generated by the contact surface perpendicular to the contact surface. With the increase of positive pressure, the area and number of contact micropoints will gradually increase, while the contact micropoints will change from elastic deformation to plastic deformation, which is an important factor. Third, the voltage utilization of power connectors Electrical connectors in use, the thermal effect accelerates the chemical reaction in the film area, which has a certain repair effect on the film. Therefore, the voltage used in the application of electrical connectors has a great impact, because when the voltage reaches a certain threshold, the contact film will be broken, and the contact resistance will drop rapidly. This is an issue that requires attention. Fourth, the current size of the electrical connector and the use of factors if the current of the power connector exceeds a certain value, the Joule heat generated by the energization of tiny points of the contact surface will soften or melt the metal, will also affect the concentration resistance, thus reducing the contact resistance. This is a very common problem. Fifth, the surface quality factor of the power connector If the contact surface of the electronic connector has oil, dust and other deposits, often forming some loose surface film, resulting in particles easily embedded in the concave and convex parts of the contact surface, increasing the resistance of the contacts, reducing the contact area of the contacts, thus affecting the normal use of the electrical connector. This is a matter of concern. Terminals are categorized into single terminal connections and multi-terminal connectors. For multi-bit connectors, due to the different spacing, different load densities (load density can be simply understood as the number of terminals installed in a connector) will have different impacts on the load carrying capacity of the entire connector.

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