0386107832

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Terminal blocks, commonly known as barrier blocks, are one of the important products in the 0386107832 application field. They are widely used in the electronic and electrical industries, and can also be divided into multiple types depending on their different working principles.

The most fundamental as well as the most common type of terminal blocks use the double screw principle. This type of terminal blocks consists of two screws, usually integrated with a plastics housing. These screws have two jobs: one is to loosen the screws when wiring or disassembly. The second is to make an electrical connection by tighting. Hence, when the two screws are tighten, they form a physical contact and thereby creates an electrical connection between two circuits. One of the advantages of double screw mechanism is that minor vibration or thermal expansion can not easily break the electrical connection, and thus, ensures a reliable current supply.

The second type of terminal blocks, commonly known as spring clamps, operate on a different principle. Instead of relying on screws to make physical or electrical contact, this type of terminal blocks uses springs embedded within the plastic housing. When inserting the wire in the right direction, these springs press down on the wire and make contact with it. Compared with the double screw mechanism, installation of spring clamps require less manual labour. Moreover, with the aid of the special cover design, the contact pressure created can be different according to the wire diameter, leading to a more reliable electrical connection.

The third type of terminal block, also known as the spade lug system, works on a different mechanism. In this type of terminal blocks, the wire end is bent in a \'spade\' shape and inserted directly into the terminal block. In general, the contact resistance of spade lug terminal blocks is lower compared to the two previous types but advantages of spade lugs can be negated by the fact that they require more working space compared to other room blocks.

Finally, the last type of terminal blocks is the crimp terminal block. This type relies on special tools to crimp a metal ‘crimp terminal’ over the stripped wire end. This is then simply inserted into the plastic housing. Here the metal terminal typically makes contact with a metal plate and thus forms an electrical connection. Asymmetrical contact (one side is concave and the other is convex) is widely used in a crimp terminal block. This ensures reliable contact between the metal terminal and metal plate and further ensures current flow.

In conclusion, terminal blocks or barrier blocks are essential components of the electrical industry. Depending on their application needs, they can come in various types, each with different working principles. Although all of them work differently, they serve the same purpose of providing a safe, reliable and easy-to-assemble electrical connection.

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