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Terminal blocks are used in a wide range of applications in many different industries, providing connections between more than two electrical points. They are rugged and reliable, able to withstand the extreme conditions in which they must function. The two most common types of terminal blocks are headers, plugs and sockets.

The basic purpose of the header terminal block is to provide a connection point for a variety of conductors. They come in several different styles which can range from something as small as a single call block to something as large as a stacked 50-way header block. Header terminal blocks typically feature either screw or solder terminals, or a combination of both. In electronics, they are widely used for prototyping and development which allows engineers and technicians to quickly connect and disconnect devices.

The use of plug and socket terminal blocks allow for quick and easy connection. They are usually made from a strong insulating material such as polystyrene, and feature a number of active contacts which may either be male or female depending on the placement. They feature metal inserts which ensure the contacts make good electrical connections. With their low profile design they can fit into confined spaces and allow for high-density signal connections.

The working principle of a terminal block is quite simple. Once two or more pieces of wire or cable are connected into the respective ports, the terminals will lock them together. This creates a secure connection which is both vibration and heat tolerant. The permanent nature of the connection also ensures that power is transferred consistently. Thanks to the variety of contact blocks and terminal blocks on the market, users can easily configure any kind of electrical circuit.

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