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What factors affect the reliability of the contact resistance of electronic connectors?
Release Date:
2020-09-15 20:10
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As an electronic component for line connection, the reliability of the contact resistance of an electronic connector is a prerequisite for ensuring safe connection of the line. In actual use, there are several factors that will cause the reliability of its contact resistance to decrease. What are the specific factors? What? Let’s get to know each other.
Factors that affect the reliability of electronic connector contact resistance are as follows:
1. Contact materials. At present, domestic electronic connectors have different contact resistance assessment indicators for contacts of the same specifications and different materials. According to relevant specifications, for the contact resistance of a contact piece with a diameter of 1mm, the requirement for copper alloy material is ≤5mΩ, and the requirement for iron alloy material is ≤15mΩ.
2. Vertical pressure. The so-called vertical pressure refers to the force perpendicular to the contact surface generated by the two contact surfaces. The size of the vertical pressure is closely related to the properties and materials of the electronic link contacts.
The number and area of contact points will also increase simultaneously, causing plastic deformation of the contact micro-points. As the concentrated resistance decreases, the contact resistance also decreases.
3. Surface morphology. The surface morphology of electronic connectors is affected by the shape of the product and the use environment.
4. Use voltage. When the voltage is at a certain threshold during use, it will break down the contact film layer, causing the contact resistance to decrease. The thermal effect will have a certain repair function on the contact film layer, the resistance value will be non-linear, and small fluctuations in voltage will cause large changes in current.
The above are the four factors that affect the reliability of the contact resistance of electronic connectors. I hope you will understand this after reading. In order to ensure the reliability of the connection, try to ensure the correctness of installation and scientific use.
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