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What is a PCB terminal block?

PCB terminal blocks, also known as electronic blocks, are manufactured to be mounted on a printed circuit board or PCB. It is important to distinguish between PCB terminal blocks with integrated pins and those with removable pin strip mounting.

PCB terminal blocks are modular insulating devices that mount on a printed circuit board and hold two or more wires together. Terminal blocks are used to hold and terminate electrical wires and in their simplest form consist of multiple individual terminals arranged in long strips.

Terminals can be used to connect wiring to the ground or, in the case of electricity, electrical switches, and receptacles to power. The terminal body is usually composed of a copper alloy that has the same coefficient of expansion as the wire intended for use. This not only prevents loosening due to different expansion rates but also reduces corrosion caused by electrolysis between two dissimilar metals.