How to use a multimeter to measure the rectifier bridge is good or bad - Database & Sql Blog Articles

GW MB10F 0.8A 1000V rectifier bridge

1. Half-bridge detection: The half-bridge is composed of two rectifier diodes. It can be judged whether the half-bridge is normal by measuring whether the positive and negative resistance values ​​of the two diodes inside the half-bridge are normal with a multimeter.

2. Detection of full bridge Most of the rectified full bridges are marked with "+", "-", and "~" symbols (where "+" is the positive pole of the rectified output voltage, and "-" is the negative pole of the output voltage. , "~" is the AC voltage input terminal), it is easy to determine each electrode.

During the detection, the positive and negative resistance values ​​of the rectifier diodes between the "+" pole and the two "~" poles, the "-" pole and the two "~" can be measured separately (the same as the measurement method of the common diode). If it is normal, it can be judged whether the full bridge is damaged. If the positive and negative resistance values ​​of the diodes in the full bridge are both 0 or infinite, it can be judged that the diode has broken down or open circuit damage.