Terminal Blocks and Its Types

1. Terminal Blocks and Its Types

2. Terminal blocks are those connectors which terminate a single wire and connect it to a circuit or other system. Terminal blocks come in a wide variety of shapes, sizes, and ratings, but it always terminates a single wire (single pole), and they’re never multi-pole. Terminal block connectors can be very useful in situations where there is a need for semi-permanent connections that may require inspections, wire replacement, repair, and change. This is the reason why terminal blocks are incredibly common in domestic wiring & industrial environments. While not every terminal block has PCB contact pads or legs, but they always have a mechanically solid body which is made up of plastic or other insulating material. Types of Terminal Blocks Screw Terminals These terminal blocks have a screw for holding a cable or wire. More commonly screws have flat-head fittings, and they are often found in situations where voltage and current demands are moderate (domestic/commercial wiring). While wires bound to the terminal block are not bonded physically with the use of solder. If done correctly, they can be incredibly strong

3. and can be used in permanent scenarios. Great care needs to be taken while tightening terminal blocks because over- tightening can damage the inserted cable leading to an unreliable and potentially dangerous connection. Barrier Terminals Barrier terminals are quite similar to screw terminals where screws are used for holding cables. These terminal blocks often have more than one termination point for multiple cables. Due to this, there are small barriers between individual terminals. They can also have small lids and enclosures for further protecting cabling, and they are commonly found in domestic wiring & other high-voltage scenario where there is a need to prevent arcing or potential short-circuits. Push-fit Terminals These terminal blocks use small spring-loaded levers which allow cables to enter the terminal block in one direction but doesn’t allow them to leave, effectively holding the wire in place; hence, it is named as “push-fit.”

4. This terminal has certain advantages over screw terminals where they prevent over-tightening, but as a result, the designer is reliant on the spring for having enough force to keep the wire in contact with the conductive body. Pluggable Terminals Pluggable terminal blocks are the ones that have a cable entry for allowing the connection of a wire or cable but a plug output to enable easy connection to a socket. These terminal blocks are very useful in situations where hot-swapping is important or a connection is required to be removable for servicing or inspecting.