What are the basic performance characteristics of board-to-board connectors?
Release time:
2023-08-18
The basic performance of board-to-board connectors can be divided into three main categories: mechanical performance, electrical performance, and environmental performance.
1. Mechanical performance: In terms of connection function, insertion and extraction force is an important mechanical performance.
1. The insertion and extraction force is divided into insertion force and extraction force (the extraction force is also known as separation force), and the requirements for both are different. Relevant standards specify a greater insertion force and a minimum separation force, indicating that from a usage perspective, the insertion force should be small (thus there are low insertion force LIF and zero insertion force ZIF structures), while if the separation force is too small, it will affect the reliability of the contact.
2. Another important mechanical performance is the mechanical lifespan of the board-to-board connector. The mechanical lifespan is actually a durability indicator, referred to as mechanical operation in the national standard GB5095. It is based on one insertion and one extraction as one cycle, and whether the connector can normally complete its connection function (such as contact resistance value) after the specified insertion and extraction cycles.
The insertion and extraction force and mechanical lifespan of board-to-board connectors are related to the structure of the contact components (size of the normal pressure), the quality of the coating at the contact area (coefficient of sliding friction), and the dimensional accuracy of the arrangement of the contact components (alignment accuracy).
2. Electrical performance mainly includes contact resistance, insulation resistance, and dielectric strength.
1. Contact resistance: A high-quality electrical connector should have low and stable contact resistance. The contact resistance of connectors ranges from a few milliohms to several tens of milliohms.
2. Insulation resistance: An indicator measuring the insulation performance between the contact components and between the contact components and the shell, with a magnitude ranging from hundreds of megaohms to thousands of megaohms.
3. Dielectric strength, also known as withstand voltage: It characterizes the ability of the connector's contact components or the contact components and the shell to withstand the rated test voltage, depending on the gap between circuits (i.e., the distance between contact components and creepage distance) and the insulating materials used in the connector.
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