325342-25-0

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Terminal Blocks - Barrier Blocks

A terminal block, also referred to as a barrier block, is a passive electrical component consisting of two or more electrical contact points. Electrical connections using terminal blocks are typically removable, meaning they can be taken out and put back in without soldering or welding.

The number ‘325342-25-0’ in the title of this article is a type designation of a terminal blocks made by a specific manufacturer. Terminal blocks made using this type often include standard features such as terminal junction points, pluggable contact systems, mounting brackets and/or springs, and plastic insulation.

Application Field

Terminal blocks are used typically in the electrical and electronic industry for easy and secure connection of wiring. Commonly they are used for device termination, wire-to-wire connection, and high current switching and protection. The scope of application of terminal blocks can range from “simple” household appliances such as coffee makers, and music systems, to complex machines such as car engines, and technology used in nuclear and medical facilities.

Working Principle

The primary aim of terminal blocks is to provide clean, safe connection of wires without the need for soldering or welding. This is achieved through the use of terminals, contacts, and connectors. The terminals provide the contact points for the electrical circuit while the connectors or contacts secure the wires to ensure that reliable and secure connection is maintained even under toughest of conditions.

Terminals are usually made of metal such as copper, brass, and gold. The terminals can have various shapes, from pins, rounds, stripes, and snaps, to blades and bars. Connectors and contacts can also be single or multiple, depending on how many wires need to be connected.

Terminals are typically assembled either in a line or a group. In a line, one wire is connected to multiple contacts, while in a group, multiple wires are connected to a single contact each. This makes it possible to connect larger number of wires with ease.

Terminal blocks usually have two functions, electrical and mechanical. The electrical function is the actual contact connection, while the mechanical function is an actuating and locking mechanism, which holds the terminal in place even during strong vibrations or shocks.

Various types of insulation are also available for terminal blocks, to prevent accidental shorts and providing proper protection against hazardous environments. The most common insulation materials are plastic, glass, and porcelain.

Terminal blocks offer several advantages such as easy installation, ease of moving and replacing, easy grounding, safety from accidental short circuits, and overall better system conditioning. These features make them highly suitable for many types of electrical and electronic applications.

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