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Terminal Blocks – Headers, Plugs and Sockets are devices used in electrical wiring and connectors. A terminal block is an assembly of interconnected conductors providing the interface between the power or signal source and the consumer. It is designed to provide a reliable and secure connection between the two terminals which may lead to the use of a contactless connection in certain instances.

Terminal blocks are mainly used to interface low-voltage electrical equipment and systems with mechanical wiring. They also offer a wide range of protection features such as polarity reversal and the use of spacer washers or clips to ensure secure connections. The most common types of terminal blocks include terminal blocks with pre-mounted pins, bent pins, through-hole terminals, and press fit terminals.

The capacity of a terminal block depends on its size and the number of wires or pins that it is designed to accept. The smaller terminal blocks can hold up to three or four wires, while the larger ones can accommodate up to ten. They are generally used in low voltage and low current applications, but can also be found in higher current applications.

Terminal blocks can come in various shapes and sizes and are available in both prefabricated and custom configurations. Prefabricated terminal blocks come with pins or screws that are pre-mounted to the terminal block, while custom terminal blocks feature the option of being able to customize the pins and screws according to the application requirements.

The working principle of a terminal block is simple. A current carrying wire is either connected directly or via a spacer or clip to a contact point on the terminal block. Depending on the type of terminal block, the contact point may be either a pre-mounted pin or a bent pin. The bent pin is then connected to a conductive metal sheet or plate embedded in the terminal block. This metal plate then transfers the current to the equipment being connected.

The contact points on a terminal block are designed to ensure a reliable and secure connection with the wires or pins. For example, the pins are designed with sharp edges to create a tight fit when connected to the wire. The pins are also made from corrosion-resistant materials to ensure a reliable and secure connection.

Terminal blocks are widely used in the industrial and commercial sectors. They are commonly found in industrial control cabinets, residential and commercial circuit panels, computer enclosures, power supplies, and many other applications. Due to their various protection features, they are also often used to provide an effective and reliable connection between low voltage electrical equipment and systems.

In conclusion, terminal blocks, including both prefabricated and custom units, provide an effective and secure connection between low voltage electrical equipment and systems, with varied protection features. They are widely used in the industrial and commercial sectors and come in various shapes and sizes.

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