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Terminal Blocks - Headers, Plugs and Sockets

Terminal blocks are a basic electrical component typically used in the wiring of electrical and electronic systems. They are used to interconnect electrical conductors, to ensure reliable and secure electrical connections. This type of connection is also commonly known as a ‘jumper’ or a ‘connector’.

Terminal blocks can be used in a wide range of applications, including in home wiring applications, industrial applications such as power distribution, electronics manufacturing and telecommunication. In these applications, terminal blocks are used to provide mechanical and electrical support for various electrical conductors.

Terminal blocks are manufactured with various types of material, such as polyvinyl chloride (PVC) and polyamide (PA) and are available in a variety of sizes, shapes, and colors. The types of terminal blocks are divided into two broad classes: headers, plugs and sockets. Each type has a unique design and function that is ideal for specific applications.

Headers, often referred to as ‘terminal boards’, are comprised of paralleled rows of terminal posts. In many instances, headers are equipped with test points which allow for greater flexibility in testing and harnessing. Additionally, headers are often adjoined to flame retardant insulators, and some models come equipped with current-carrying bars for increased strength and reliability.

Plugs feature a single column of terminals, each featuring a unique design that allows for easy connection and disconnection. Plugs are often used in electronic devices and are typically made of either thermoplastic or ABS material. These terminal blocks are also widely used in automotive and high-temperature applications.

Sockets are similar to plugs in that they feature a single column of terminals - however, they are designed to be soldered or crimped onto a wire or lead, whilst plugs are made to be screwed onto a wire or lead. Sockets are often used in industrial and aerospace applications, as they have an increased capacity for withstanding high temperatures.

As previously mentioned, terminal blocks are used in a variety of settings. Their purpose is to connect two different sets of electrical conductors in order to provide reliable electrical connections. The most common types of terminal blocks available are headers, plugs and sockets. Each of these types of terminal blocks has a specific design and function that makes it suitable for certain applications.

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