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Terminal Blocks - Headers, Plugs and Sockets

Terminal blocks, or terminal headers, are metal connectors used in electrical components to make connections between two or more circuits. They are used in many industrial and industrial-grade applications, such as in industrial automation, machine tools, and robotics, as well as in many consumer products. Terminal blocks come in a variety of shapes and sizes, but the common types are headers, plugs, and sockets.

Headers

Headers are the most commonly used type of terminal block. They are the simplest of the three types and are often the most economical solution for making electrical connections. They are usually composed of a single piece of metal with a rectangular-shaped head which is connected to two or more pins, each connected to its own terminal contact.

Header blocks are also available with pre-attached terminals or you can purchase unassembled blocks that require additional terminals. To connect two or more cables to a header block, you can solder the terminals directly or use a tool such as a crimp tool or tinning iron. Headers can also be used to distribute power and ground to various components, making them ideal for many applications.

Plugs

The next type of terminal block is the plug. Plugs are composed of two or more pins which are connected to a metal casing, called an insulated housing. They are inserted into a hole drilled in the PCB board and allow for an easy connection of cables from both front and back panels. Some plugs may also be used for in-line wire-to-wire connections.

Plugs are used in a variety of applications. They are commonly used in automation and control systems, automotive markets, and industrial applications. They are also typically used for testing, benchtop purposes, and laboratory use.

Sockets

The last type of terminal block is the socket. Sockets are designed to be plugged into a female or male connector. They are available in many sizes and can be soldered or crimped to the cable. The use of sockets allows for a more flexible connection solution as they can be inserted into a wide range of male/female connectors. They are commonly used in automotive markets, control systems, industrial applications, and robotic controls.

Terminal blocks made from plastic and metal are available, but metal is the most popular choice due to its durability and insulation. It is important to consider the types of connectors and cables that will be used with the terminal block, as this will affect the size and shape of the terminal. The voltage and current applications should also be considered when selecting a terminal block.

In summary, terminal blocks, or terminal headers, are metal connectors used in electronic components to make connections between two or more circuits. They come in a variety of shapes and sizes, but the common types are headers, plugs, and sockets. Headers are the simplest type and are typically the most economical solution for making electrical connections. Plugs are inserted into a hole drilled in the PCB board and allow for an easy connection of cables from both front and back panels. Sockets are designed to be plugged into a female or male connector, and are available in many sizes and can be soldered or crimped to the cable.

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