2. Function: Its function is to act as a bridge between blocked or isolated circuits within the circuit, undertaking the task of transmitting current or signals. Usually used in conjunction with the busbar to form a board to board connection; Or it can be used in conjunction with the end of the electronic wire bundle to form a board to wire connection; It can also be used independently for board to board connections

3. Classification: According to the spacing, it can be roughly divided into seven categories: 0.8mm, 1.0mm, 1.27mm, 2.00mm, 2.54mm, 3.96mm, 5.08mm (other special spacing can also be customized according to needs); According to the number of rows, there are single row female, double row female, three row female, four row female, etc; According to the packaging rules, there are surface mount SMT, plug-in DIP (direct insertion/bending insertion), etc; Divided by installation method: 180 degrees, 90 degrees SMT； According to whether it needs to be raised and whether it needs to be equipped with positioning columns, there are two types of positioning columns, one is the inner positioning column and the other is the ear positioning column; Types of female terminal: U terminal and Y terminal (U-shaped terminal, generally used for contacts with three surfaces of high and low plastic); Y-shaped terminals are generally used for those with high plastic height and two contact surfaces.

Attention: Please slowly insert and remove the pin and nut, especially when removing the pin, make sure that both ends of the pin can come out at the same time as much as possible to avoid damaging the pins.