1849956

Terminal Blocks - Headers, Plugs and Sockets

Terminal blocks are electric components that provide the means to connect wires and cables to electrical circuits. They can be found in a wide range of applications such as electrical panels, wiring in commercial, industrial and residential buildings, as well as in instrumentation and telecommunications systems. They are available in different configurations such as headers, plugs, and sockets.

1849956 Application Field and Working Principle

Terminal blocks are widely used in industrial control systems for secure and reliable interconnection of electrical components. They are often used in electrical panel boards to connect current carrying terminals, ground terminals, and neutral terminals. Companies who focus on automation employ them in order to create data inputs and output networks in their production processes.

Terminal blocks typically feature two screws situated on the side which are used to clamp down metal studs. The studs secure the incoming wire and allow for easy connection as they can be tightened and loosened as needed. Once the outer screws are tightened, the metal stud creates contact with the inner part of the terminal block, transferring current from the incoming wire and to the succeeding wire. The terminal block then acts as a protective conductor, preventing overcurrent or fault energy from affecting the incoming or succeeding wire.

There are different types of terminal blocks available on the market, such as those with fuse holders which provide added safety and protection from overcurrent. Examples of the different types of terminal blocks include screw-type blocks, spring-clamp blocks, and screwless terminal blocks.

Screw-type blocks are one of the most common terminal blocks on the market. They feature screws on the side, which when tightened, secure the connecting wires in place. Spring-clamp blocks feature a spring-loaded latch which when released, allows for a wire to be inserted. Once the latch is closed, the clamp securely retains the wires in place. This type of block ensures a secure connection for smaller scale electronic connections.

Screwless terminals are the preferred choice for specialized systems as they are easy to install and provide more secure connection. The block provides a series of slots, each of which terminates one wire. In order to secure the connection, the user would typically use a special terminal setting tool to press the slots firmly onto the wire.

Overall, terminal blocks can offer flexibility for connecting wires and cables, ease of installation, and are a great way to protect current-carrying conductors from overcurrent or fault energy.