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Connector resistance meaning

Connector resistance meaning

Blog | Jan 14,2022

No matter which connector you use, both terms will appear in the product catalog. Both represent the nature of the connector, the ability to “connect correctly.

Connector resistance meaning

Contact resistance

act resistance refers to “difficulty of current flow”.

Large contact resistance in the case of the connector will lead to easy heating, wasted power consumption will increase, and will occur in the worst case is poor conduction. In other words, the smaller the contact resistance, the better. This contact resistance depends on three main elements: the terminal material/cross-sectional area of the current path and the length/resistance of the contact.


Contact resistance


In the actual machine, in order to avoid the connection failure caused by the contact resistance of the connector, it is necessary to discuss the use method, for example, the use of multiple pins to flow the current when large current is desired. 


Contact resistance consists of the following parts


Contact resistance consists of the following parts:

Concentrated resistance RC. The resistance RC formed when the clean metal surfaces contact each other by applying a certain pressure is called concentrated resistance. Connector, due to the small contact area of the contact area, the current is compressed together when it reaches the contact area, increasing the current density, and the resistance generated by this pair is called concentrated resistance.


Film resistance RT


Film resistance RT. Metal surfaces form thin films on the surface due to adsorbed gases or oxidation or magnetization of the surface or contamination by adsorbed oxides, which tend to be a poor conductor, resulting in high contact resistance. Such films are applied to frictional breakage under a certain pressure and constant voltage, so they will contact each other with tunnel effect, so the resistance Rt is called tunnel resistance


The volume resistance Rb


The volume resistance Rb of the metal conductor itself. Different materials with different volume resistivity, which depends on the size of the microstructure of the alloy. When the electric field of the additional material, its free moving electron cloud accelerates to the positive pole under the action of the electric field, the faster the movement, the better the conductivity of the material and the existence of “impurities” or trace elements in the alloy, and cause the electric field uniformity. Thus enlarging the deflection of electron motion and increasing the amount of reflection. And increase the offset and reflection, which has an adverse effect on the conductivity of the material. The resistivity varies greatly with different alloy materials.


. Insulation resistance

Insulation resistance

The insulation resistance of the connector is “no leakage current between adjacent terminals”. If the insulation resistance is too small, a short current will occur between adjacent terminals. Compared with contact resistance, the higher the insulation resistance, the better. The insulation resistance of the connector depends on the spatial distance between adjacent terminals, the material of the forming part, and the distance along the surface.


contact resistance refers


In connectors, contact resistance refers to the resistance associated with the “connector and connection part”, electrical resistance associated, and insulation resistance refers to the electrical resistance “between adjacent terminals”. Zhejiang Lianhe electronics Co., Ltd. specializes in the production of all kinds of wire to board connector, board to board connector, wire to wire, row needle row TT horn, and other kinds of electronic connector welcome new and old customers to order.

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