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Terminal Blocks - Headers, Plugs and Sockets

Terminal blocks offer a versatile and convenient way to connect electrical power and signals together. The compact and rugged designs make them well suited for a variety of applications. They are used in a range of industries from automotive, aerospace, and telecommunications to consumer electronics.

Often referred to as the “building blocks” of electrical systems, terminal blocks are the interface between power and circuitry. By using the right type of connector, the terminal block helps ensure consistent and reliable performance.

The most common type of terminal block is the header, plug and socket. This type of terminal block has the header, or base, which consists of the terminal block with its contacts, connectors, and safety features. It also has a plug, or “bridge” that connects to the header. Finally, a socket is connected to the terminal block that connects to the plug. These connectors enable direct current, alternating current, and pulse current to flow safely through the circuit.

The other types of terminal blocks include the screw type and the press-fit. The screw type terminal blocks are usually used to transfer low to moderate amounts of current and require some kind of tool to be tightened. The press-fit type of terminal blocks are suitable for quickly connecting wires, circuits, and components together and require no extra tools.

Depending on the application, there are two types of pin spacing used for terminal blocks. The pin spacing can range from as small as 0.100” up to 5mm. For higher power applications, the pin spacing needs to be larger as more current needs to travel through the terminal block.

Terminal blocks have several advantages over other wire-to-device connection methods. First, they are extremely cost-effective and will last longer in a demanding environment. Second, they are easy to install and, in most cases, require just a screwdriver to tighten the terminal. Third, they offer an extremely reliable connection because the terminal block itself has multiple contact points between the breakaway pin and the board.

Terminal blocks are an important part in virtually any electronic system, from simple control systems to complex network switching systems. An understanding of the various types of terminal blocks, their features, and the application in which they are used will help you make the best choice when selecting components for your system.

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