How to choose Terminal Block?
Before choosing a model, you need to know what kind of terminal you want?
Classified by current: ordinary terminals (small current terminals), high current terminals (above 100A or above 25MM wires), etc.;
According to the shape classification: it can be divided into rail type terminal, fixed type terminal, circuit board terminal (PCB terminal) and so on.
The selection of terminal blocks is nothing more than wire diameter, current, wiring direction, application occasion, wiring method and other wire diameter and current. The wiring direction generally has front wiring and side outlet, which is mainly for the convenience of technicians to operate and improve work efficiency. This is a very common problem in application occasions. The application range of terminal blocks is wide. For example, if you choose terminal blocks It is for soldering on the PCB board, so it is impossible to choose the terminal connection method used on the guide rail, generally there are docking, suspension, fixing and other methods. The basic composition of the universal terminal block is composed of an insulating base, an insulating partition, and a wire, and the insulating base is integrated.
What needs to be considered in model selection?
The selection mainly considers the following points:
1. Is the wire to be connected a hard wire or a soft wire?
2. What is the cross-sectional area of the wire in square millimeters? (without wire sheath)
3. How much current and voltage does the terminal need to withstand?
4. How many holes should be used for the connector?
Every connector, no matter how many holes, is internally connected. Therefore, we need connectors with several holes to connect several wires together. For example, a 4-hole connector can connect up to 4 wires. If there are only 3 wires to be connected, then just leave a hole. Since each connector is internally conductive, the live wire, neutral wire, and ground wire cannot be inserted into the same connector, otherwise it will cause a short circuit. Therefore, in any case, one must be used for the live wire, one for the neutral wire, and one for the ground wire!
5. Can wires of different thickness be connected to the same connector?
At present, the springs of each hole of the terminal connector are independent, so wires with different cross-sectional areas can be used safely and reliably as long as they are within the connection range of the connector.