With the development of economy and technology and the development of the terminal industry, the types of terminal blocks are becoming more and more complete. Faced with a dazzling variety of terminal blocks, how to choose suitable, high-quality, low-cost terminal blocks? The editor will help you below.
At present, the main types of high-current terminal blocks are: European terminal blocks, plug-in terminal blocks, barrier terminal blocks, spring-type terminal blocks, track-type terminal blocks, through-wall terminal blocks, and photoelectric coupling terminal blocks. According to the size of the power, it is divided into ordinary terminals (small current terminals) and large current terminals (above 100A or 25MM lines).

According to the appearance classification, it can be divided into guide rail terminal, fixed terminal, circuit board terminal and other terminal selection, which is nothing more than wire diameter, current, wiring direction, application, wiring method, etc. First of all, to choose a high-quality terminal block, you must first consider the power processing factor. Simply reading the data sheet does not guarantee accurate comparison data. You should understand how the product performance data listed in the manual is tested and determined. Because there is no unified standard when determining the power and performance specifications of the terminal products. Different standards, there will be some differences in data.
In addition, consider the termination technology used by the product. At present, most of the terminal blocks are still using through-hole connection. This method can provide the required mechanical support and ensure solid electrical contact with the power layer embedded in the multi-layer circuit board. Some companies also provide multi-pin products, which have the ability to distribute the current to the circuit more evenly. In the board wiring, it provides more reliable mechanical stability and improves the firmness of welding.
The above briefly introduces the selection from the internal performance and the use of standards, and the following briefly introduces how to choose the terminal block from the appearance. Because this situation is often encountered in practice, the terminal product meets all the mechanical and electrical parameter requirements, but it has to be changed because it does not meet the appearance requirements. Properly polished or the appropriate color of the terminal block can get a good appearance and feel. Gold-plating the terminal device used in audio equipment will increase the cost and not significantly improve the performance, but the gold-plating does improve the performance. The appearance of the product is more favored by customers.

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