How to choose high-quality terminal blocks?


How to choose high-quality terminal blocks? Four points […]

How to choose high-quality terminal blocks? Four points teach you how to distinguish between good and bad terminals
The terminal is the part that connects the battery to the external conductor. In electrical engineering, the terminal refers to the wiring terminal, also called the terminal. The types are divided into single hole, double hole, socket, hook, etc. From the material, copper silver plating, copper zinc plating, copper, aluminum, iron, etc. Their role is mainly to transmit electrical signals or conduct electricity.

When facing the terminal selection, the first thing everyone thinks about is the wire diameter, current, wiring direction, application, wiring method, etc. The wire diameter and current are the wire diameter and the rated current. In addition, the wiring direction is generally positive and The design of the side outlet is mainly to facilitate the operation of the technicians, thereby improving the efficiency of work. The terminal block has a wide range of applications. For example, if the terminal block is purchased for soldering on the PCB circuit board, it is impossible to choose the terminal block wiring method used on the guide rail. Generally, there are common wiring methods such as butting, hanging, and fixing. The basic structure of the terminal is composed of an insulating base, an insulating partition, and a wire, and the insulating base is integrated.

Under different environmental conditions, there are certain rules to find the correct choice and use of terminal blocks. Although there is no clear regulation of the use system in the industry, specific terminals can be selected according to the specific use environment and use conditions. Four basic principles can be used as reference.

First of all, you need to know what kind of terminal you want before fixing the terminal. According to the function of the terminal, there are ordinary terminals, insurance terminals, test terminals, ground terminals, double-layer terminals, double-layer conduction terminals, three-layer terminals, three Layer conduction terminals, one-in and two-out terminals, one-in and three-out terminals, double-in and double-out terminals, switch terminals, overvoltage protection terminals, marking terminals, etc. According to the current classification, it is divided into ordinary terminals (small current terminals) and high current terminals (above 100A or 25MM lines). Classified by appearance. Can be divided into rail type terminal fixed terminal circuit board terminal (PCB terminal) and so on.

The second thing to consider is the size of the wiring. For different wiring terminals, its size and wiring range are different. Generally, when using terminals, it is better to choose a wiring range that is slightly larger than the actual wire diameter. Because the current market standards are rather chaotic, if you choose a wiring aperture with the same size as the wire diameter, you may not be able to insert the wire into the crimping frame because the terminal produced in the market does not meet the standard, resulting in a smaller wiring range.

It is current again. For the rail terminal, a product that has been in the market for decades, there are regulations for current in the industry. Different models have specific current specifications. Products must meet or exceed this standard. standard.

The last is the amount of space used. Different terminals can be selected for different space sizes. For example, in a small space, you can choose a double-layer terminal or a three-layer terminal.


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