Both diodes are unidirectional and can be used in rectification applications.

The difference is that the withstand voltage of ordinary silicon diodes can be made higher, but its recovery speed is low, and it can only be used for low-frequency rectification. If it is high-frequency, reverse leakage will occur due to the inability to quickly recover, which will cause the tube Severe heating and burning; Schottky diodes often have low withstand voltage, but their recovery speed is fast and can be used in high-frequency applications. Therefore, switching power supplies use this type of diode as a rectifier output. However, the rectifier on the switching power supply The tube temperature is still very high.