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Terminal blocks are electrical interconnection components that provide a safe, reliable, and convenient means of connecting two or more electrical circuits. The products are uniquely designed to meet the needs of a broad range of industrial, commercial and residential purposes and are commonly employed in factory automation, machine equipment, measuring instruments, electric power, electric lighting, communication, automotive applications, etc. In the field of database management, they are also used to store and retrieve data.

Headers, plugs and sockets are the basic types of terminal blocks. Usually they comprise the terminal block system which consists of the receptacle and the mating plug. The receptacle is mounted and wired to a printed circuit board while the plug usually fits in (or onto) the cable. A wide variety of configurations is available depending on the application.

The most common applications for terminal blocks include wiring harness assemblies, electronic equipment housings, instrumentation cabinets, panel boxes, printed circuit boards, backplanes, lighting fixtures, etc.

Header terminal blocks are suitable for PCB mount applications and they are available in various standard and custom designs. These terminal blocks require less panel space in comparison to traditional wire-to-board-connector systems. In addition, header terminal blocks are specifically designed for fast and safe assembly.

Plug and socket terminal blocks are mainly used to interconnect electrical cables. They are available in a wide variety of configurations, including 120 degree angled, 45 degree angled, straight, and ribbon cables. Plug and socket terminal blocks come with either standard magnetic latching or spring clamps.

The working principle of terminal blocks is based on the use of insulation displacement contact (IDC) technology. This technology allows the terminal block system to make contact with the conductive strands inside the conductor jacket or insulation without having to strip the conductor. The IDC technologies can be manual or automatic, and also provide re-sealing capabilities.

Manual terminal block systems are suitable for connections where re-sealing may not be necessary and the number of connections is relatively low. In automatic terminal block systems, electrical connections are made via punching tools which mechanize the termination process.

Another important feature of terminal blocks is that they can be reused. Unlike traditional connectors, which are often discarded after being used once, terminal blocks can be disassembled, and the same component can be reassembled in order to make a new connection. This makes them extremely cost-effective and makes them ideal for applications such as manufacturing plants.

To sum up, terminal blocks provide an efficient means of interconnecting electrical circuits and are widely used in various industrial and commercial applications. Headers, plugs and sockets are the three main varieties of terminal blocks, each of which has its own range of applications. The working principle of terminal blocks is based on the use of IDC technology. Furthermore, terminal blocks are also reusable, thus making them a cost-effective solution for many different applications.

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