How to distinguish the four legs of a rectifier bridge

A rectifier bridge typically consists of four electrodes, two of which are positive (Anode, marked as AC,~or arrow) and the other two are negative (Cathode, marked as -, - or circle). To distinguish these four electrodes, you can follow the following method:

1. Observation marks: The feet on the rectifier bridge usually have marks or symbols to indicate the positive and negative poles. Find symbols such as AC,~, arrows to identify the positive pole, and symbols such as -, -, circles to identify the negative pole.

2. Measure resistance: Use a multimeter or resistance meter to measure resistance. The positive electrode is usually connected to a higher resistance, while the negative electrode is usually connected to a lower resistance. By observing the changes in resistance, the positive and negative polarities of the four pins can be determined.

3. Reference data sheet or specification sheet: If there is a specification sheet or data sheet for the rectifier bridge, relevant information can be consulted to determine the positive and negative polarities of the four pins.

The above methods are applicable to general rectifier bridges. In certain specific models of rectifier bridges, there may be different markings or arrangements. Therefore, it is best to refer to the corresponding specifications or instructions provided by the manufacturer to accurately determine the positive and negative polarity of the four pins.