What Are Card Edge Connectors?

In modern electronic products, Card Edge Connectors are a highly efficient and reliable means of electrical connection. These connectors are widely used in various fields such as computers, communications, industrial control, and consumer electronics. As electronic devices become increasingly compact and performance demands continue to rise, Card Edge Connectors have become indispensable components in many industries due to their compact design, low cost, and high reliability. This article will provide a detailed introduction to Card Edge Connectors, covering their definition, types, working principle, characteristics and advantages, applications, and more.

I. What Are Card Edge Connectors?

Card Edge Connectors, also known as edge connectors or card connectors, are components that establish electrical connections through the contact between the "gold fingers" on the edge of a printed circuit board (PCB) and the connector's female base. The design of Card Edge Connectors allows them to withstand frequent insertion and removal cycles, making them ideal for high-speed data transmission applications. They are primarily used in expansion cards, modular hardware systems, and various electronic devices, providing stable signal transmission and power connections.

II. Working Principle

Card Edge Connectors work by creating an elastic pressure contact between the PCB's gold fingers and the contacts in the connector base. During insertion, the slotted plastic base guides the gold fingers into alignment, and the spring contacts provide continuous pressure, ensuring low impedance and stable electrical connection. When removed, the spring contacts return to their original position, minimizing wear on the gold fingers, making these connectors ideal for repeated insertion and removal.

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