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Terminal Blocks - Headers, Plugs and Sockets

Terminal blocks are a vital connection component often used to provide an electrical connection within an application. Terminal blocks come in a variety of styles, sizes and configurations to suit its intended application. An understanding of its application field and working principle is important for any designer or engineer when specifying terminal blocks.

Application Field

Terminal blocks are frequently used in control units, power supply systems, automatic control systems, communication systems, servo systems, measuring systems, electricity distribution boxes, and other industrial machines and equipment. Terminal blocks are especially popular when it comes to applications requiring a large number of electrical connections. In such cases, terminal blocks are a great choice due to their ease of removal and replacement with replacements.

In addition, they are useful in applications where there is a need to protect signals or connectors from external vibration, shocks or other stress related issues. Terminal blocks can be used to link a number of different connectors, such as LED\'s, sensors, switches, solenoids, power supplies and other components, which can then be easily disconnected for service or maintenance.

Working Principle

To provide an electrical connection through a terminal block, a connector is fitted. It is important to chose the correct type of connector for the terminal block, as some are suitable for one type of block and others for another. The connector is typically pushed through the terminal block, where it is held in place by spring clips or other suitable locking mechanisms.

When the connector is in place, the connection is made by two metal contact points, usually made of solder. Once the metal contact points are connected, an electrical connection is established. The connection is held in place by a holder which holds the connector in the terminal block. Different terminal blocks may have different types of holders for different connections.

To disconnect the connection, the holder is removed and the connector is released. This allows for simple servicing and replacement of connectors, along with easy reconfiguration of the connection. Some terminal blocks feature a safety cover which prevents accidental disconnection.

Conclusion

Terminal blocks provide an important connection component often used to make an electrical connection within an application. With a variety of styles, sizes and configurations to suit different situations, an understanding of its application field and working principle is important for any designer or engineer when specifying terminal blocks.

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