Connector Resistance Meaning
Blog | 1月 14,2022
Regardless of which connector you use, the terms Connector Resistance or Connector Contact Resistance will appear in the catalog. Both represent the nature of the connector, the ability to “connect correctly”.
What is Connector Resistance
Connector 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, the resistance of the contact.
In the use of the 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, when a large current is required, use multiple pins to make the current flow.
Connector Resistance 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.
Due to the small contact area of the connector contact area, the current is compressed together when it reaches the contact area, increasing the current density. The resistance generated by this pair is called concentrated resistance.
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 certain pressure and constant voltage, so they will contact each other with tunnel effect, so the resistance Rt is called tunnel 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.
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”.
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