When the rectifier bridge circuit fails, it is found that the rectifier bridge is burned out. Generally, the heat sink is not large enough, the overload impulse current is too large, and the heat cannot be emitted.

1. The load of diode rectifier bridge circuit is short circuited and the insulation is not good. Caused by excessive load current.

2. Frequently start and stop the power supply. If the inductive load belongs to the energy storage element! Then back emf will be generated. Reverse breakdown the rectifier element. When rectifying the bridge, only one is broken. Then the symmetrical bridge arm will burn out!

3. The service time of individual components is long and the quality is reduced!