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Terminal Blocks - Headers, Plugs and Sockets

Terminal blocks, also known as headers, plugs and sockets, are devices located on both sides of a circuit board that transmit data from the electrical circuit of one side to the electrical circuit of the other. They are commonly used for switching on and off electrical circuits, providing power to other components, and connecting multiple components together. Typically, terminal blocks are designed using specialized printed circuit board (PCB) technology, which has been developed over the years to greatly reduce the cost and complexity of these components.

Application Field of Terminal Blocks

Terminal blocks are used in a variety of applications, from industrial equipment and robotics, to consumer electronics, to automotive and aerospace components. Terminal blocks can be used to link multiple circuits together, increasing the number of electrical connections that can be made within a system or circuit. As such, they play an important role in providing the connectivity needed to maximize the functionality of a circuit, while minimizing the amount of wiring and complexity.

In addition, terminal blocks provide a very cost-effective way of making a variety of electrical connections in a variety of settings. They can be used to easily connect multiple signals within a system, or to quickly add additional functionality to an existing circuit. Also, due to their modular design, terminal blocks can be easily switched out to add new entities to the circuit or replaced with more powerful or more efficient versions.

Working Principle of Terminal Blocks

Terminal blocks generally work based on the principles of electric contact technology. This technology involves the physical connection of two conductive components, typically metal, while maintaining a secure connection. In the case of terminal blocks, the contact is made by a plug with a male connector and a socket with a female connector. The plug is inserted into the socket, making contact with the conductive surfaces. This provides a secure and controlled connection that reduces the risk of electric shock and short circuits.

The contact is maintained by either a mechanical contact, a fillable individual insert, or a non-fillable contact. A mechanical contact consists of a metal insert, which is filled with an insulating material that adheres to the contact surfaces. This provides a secure connection that is resistant to corrosion and to the effects of temperature and humidity. A fillable individual insert is filled with a non-conductive material that covers the entire contact surface, preventing any electrical flow. Finally, a non-fillable contact is filled with a conductive material that conducts electricity but is not physically connected to the contact surface.

Conclusion

Terminal blocks are essential components used in a variety of applications, from industrial equipment and robotics, to consumer electronics, to automotive and aerospace components. They serve a critical role in connecting a wide variety of circuits within a system to increase functionality and reduce complexity. Usability and reliability are both improved with the utilization of these components, as they securely connect current and provide a secure and environmentally resilient connection. The selection of the correct terminal block is critical to ensure the efficient operation of any system, and the proper application can significantly reduce both costs and risks.

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