The Correct Method For Selecting Terminal Blocks

The correct selection method of terminal blocks involves multiple key factors, and the following are the specific selection steps:

1、 Understand the basic types of terminal blocks

Firstly, it is necessary to clarify the basic types of terminal blocks, including ordinary terminals, safety terminals, test terminals, grounding terminals, etc. divided by function, as well as ordinary terminals (low current terminals) and high current terminals (100A or above or 25MM wires or above) divided by current size. In addition, there are also rail terminals, fixed terminals, PCB terminals, etc. classified by appearance.

2、 Key factors for determining selection

Wire diameter and current: These are fundamental and important considerations. The rated current and wire diameter of the selected terminal block must meet the actual needs, and the wiring scope of the terminal block should be slightly larger than the specific cable diameter of the cable.

Wiring direction: There are two common wiring directions: front wiring and side wiring. The selection should be based on actual operational needs to facilitate technical personnel's operation and improve work efficiency.

Application scenarios: Different application scenarios have different requirements for terminal blocks. For example, in situations where a through wall solution is needed, H-type through wall terminal blocks can be chosen; In situations where high reliability connections are required, terminal blocks with pressure wire and thread self-locking design can be chosen.

Wiring method: You can choose the wiring method of tightening with a screwdriver or the new wiring method of spring device, depending on the application requirements.

3、 Consider other factors

In addition to the key factors mentioned above, factors such as the size of the terminal space, instantaneous changes in current and voltage, application environment (such as high temperature, humid environment, etc.), and price should also be considered. High quality terminal blocks are usually more expensive, but they have better performance and longer service life.

In summary, the correct selection of terminal blocks requires comprehensive consideration of multiple factors to ensure that the selected terminals can meet practical needs and have good performance and reliability.