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Terminal Blocks - Headers, Plugs and Sockets

Terminal blocks, also known as Headers, Plugs and Sockets, are the electrical components used to make a connection between two or more wire conductors within an electrical system. They provide a safe connection point and a reliable, tight connection which can be easily changed without the use of tools. The components consist of a plastic body, often coloured and with a coding strip or small printed logo, which contains two or more connection screws and may also have additional features such as labeling or integrated markers.

There are many different types of terminal blocks including single, double, shrouded, angled, stacked, removable, busbar, panel mount, as well as various dedicated specialty designs. The connection screws are available in a variety of different sizes and types including the European style terminal blocks for more industrial/commercial applications, which consist of three titanium screws, as well as miniature board-mounted terminal blocks which allow connection of shorter jumper wires and smaller mechanical components.

Different types of terminal blocks vary in their electrical performance and also relate to the type of connection they are suited for - one for a header block, another for a plug/socket, matching a specific type of plug or socket. However, the principles behind how they work are the same, and they all offer the same types of advantages when it comes to making reliable and safe connections.

Application Field and Working Principle

Terminal blocks can be used in a variety of applications ranging from domestic use, such as connecting audio visual wires, to larger industrial and commercial installations needing to control and distribute electricity to various circuits or directly control motors or other electronic/electrical components. The main advantages of using terminal blocks are that they make a reliable connection, are easy to change and require no special tools or wiring insight.

The working principle behind them is relatively simple - when two or more connection screws are put into the terminal they make contact with the exposed metal parts of one another, and then hold firmly due to the tightness of the screws. A conductor, such as a flexible cable or busbar, is then put into the terminal block, and this makes an electrical connection between the two inner screws. This contact is completed with the wire or busbar supplying the electrical current.

The wire or busbar can be changed whenever necessary by loosening the screws and replacing with the new wire or busbar. This makes terminal blocks ideal for adaptable purposes such as for reconfiguring wiring systems and adding or removing branches, such as in a car body wiring system.

Terminal blocks also come with additional features such as coding strips and marking strips which allow for the quick identification and labeling of their connections, as well as integrated markers which can be used to easily distinguish different connections by color. This makes it easier to organize and create efficient electrical systems. Additionally, there are also safety provisions built in to ensure that the connections effectively safe from short-circuiting or overloading.

In conclusion, Terminal blocks - Headers, Plugs and Sockets, have many uses and are a valuable electrical component in ensuring the safety and reliability of a wide variety of different electrical systems. Their easy installation and adaptability makes them a cost effective and practical choice for both domestic and industrial/commercial applications.

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