What is a fast recovery diode?

What is a fast recovery diode?

fast recovery diode are typically used for products with higher frequency rectification and freewheeling. Generally used for the input part of the power module, the frequency is not high, and there is no need to use a fast recovery diode. Use a regular diode instead.

Compared to diodes, when the voltage applied at both ends changes from forward to reverse, the response time is generally short, while when the voltage changes from reverse to forward, the response time is relatively long, which is called reverse recovery time. When diodes are used for high-frequency rectification, the reverse recovery time is required to be very short. At this point, fast recovery diode (FRDs), higher ultra fast recovery diode (SRDs), and switching diodes are required, The fastest is the Schottky transistor (its principle is different from the above diodes).