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Terminal blocks, also known as terminal strips or connector blocks, are designed to securely and easily connect two pieces of apparatus, such as routers, computers, and other electronics. These blocks are often found in industrial and commercial settings, and can be generally divided into three types: headers, plugs, and sockets.

Headers

Headers are the main connection points on an electronic device. Headers typically consist of two-pins, a short strip, or a row of tiny pins. These descriptions refer to terminals, as the name suggests, which are the two points of connection, either on the top or bottom of a board. They are used to connect the electronics of the board to each other, and to external connections and power sources. Additionally, these terminals can be configured in a variety of ways including soldered, printed circuit board (PCB) connected, or through wiring-clamp and screw terminal blocks. It is possible to also find headers that are designed for panel, wall, or printed circuit board (PCB) mounting.

Plugs

Plugs, sometimes referred to as combination plugs, are primarily used to connect two pieces of equipment together. These plugs are designed with a two-pin connector on one end and an electrical socket on the other. The socket is designed to fit into the terminals on a board, while the pin connector should fit into the headers or sockets. Plugs typically consist of a plug body, pin connectors, a socket, and a fastening device such as a screw. These plugs can come in a variety of shapes including a right angle, circular, L-shaped, and others. Additionally, the materials in which they are made of, such as plastic, aluminum, and brass, can also vary.

Sockets

Sockets, sometimes referred to as combination sockets, are designed to securely connect two pieces of equipment together. These sockets are designed with two pins on one end and an electrical plug on the other. The plug is designed to fit into a terminal, while the pins should fit into the header or plug. In general, socket materials can be made of plastic, brass, or aluminum. Likewise, there are a number of shapes for these sockets, such as right angle, circular, L-shaped, and others. Additionally, it is important to note that many of the combination plugs and sockets are designed for either a PCB or panel mounting.

Working Principle

Terminal blocks are designed to provide electrical interconnection between two pieces of equipment, such as a router and a computer. Through the use of different types of terminal blocks, such as headers, plugs, and sockets, the two pieces of equipment are safely and easily connected. To facilitate these connections, two terminals, one on either side, are typically used, with the header and socket providing the main contacts. Furthermore, a plug or head can be used for an external connection, while for board or panel mounting, combinations of the different types of terminal blocks can also be found. Through these electrical connections it is possible to provide power and data for the board, either from an outside source or when using a combination plug and socket.

Application Field

The primary application field for terminal blocks is within industrial and commercial settings, where it is important to easily and securely connect different pieces of equipment. These connections can be used for the transmission of data and power to and from the board, as well as between different electronic components. Additionally, these blocks can also be used in the automotive industry for the connection of engine components and sensors. Furthermore, some terminal blocks are designed for high-temperature environments, such as those found in the aerospace and medical fields. These high-performance blocks, such as those made from materials such as zinc and nickel are resistant to corrosion and fire and designed to withstand high temperatures and vibrations.

Terminal blocks are used in various industries and applications, encompassing both the common and complex connections. These blocks can be used to connect two pieces of equipment, provide power and data to a board, or provide high-performance solutions in challenging environments. Headers, plugs, and sockets are the three main types of terminal blocks found in these applications, with each offering their own advantages and disadvantages.

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