Basic performance of board-to-board connectors
2022-12-20
The basic performance of the board-to-board connector
The basic performance of board-to-board connectors can be divided into three categories: mechanical performance, electrical performance and environmental performance.
1 mechanical performance on the connection function, plugging force is an important mechanical performance. Insertion force is divided into insertion force and pull-out force (pull-out force is also known as separation force), the requirements of the two are different. In the relevant standards there are greater insertion force and minimum separation force provisions, which indicates that, from the point of view of use, the insertion force to be small (so that there is a low insertion force LIF and no insertion force ZIF structure), while the separation force if too small, it will affect the reliability of the contact.
Another important mechanical property is the mechanical life of the board-to-board connector. Mechanical life is actually an indicator of durability, in the national standard GB5095 to call it mechanical operation. It is an insertion and an unplugging as a cycle, to the specified plugging cycle after the connector can normally complete its connection function (such as contact resistance value) as the basis for judging.
Board-to-board connector plugging force and mechanical life with the contact structure (positive pressure size) contact parts plating quality (coefficient of sliding friction) and the size of the contact arrangement accuracy (alignment) related.
2. Electrical performance mainly includes contact resistance, insulation resistance, current and electrical strength
Contact resistance: high-quality electrical connectors should have a low and stable contact resistance. Contact resistance of the connector from a few milliohms to tens of milliohms ranging.
Insulation resistance: a measure of electrical connectors between the contact parts and between the contact parts and the shell insulation performance indicators, the order of magnitude of hundreds of megohms to thousands of megohms ranging.
Electrical strength or voltage resistance: characterize the connector between the contact parts or between the contact parts and the shell to withstand the rated test voltage, depending on the gap between the circuit (i.e., the contact spacing together with the creepage distance) and the insulation materials used in the connector
