The role of fast recovery diodes in DC circuits

Generally speaking, the forward voltage drop of fast recovery diodes is small, around 0.4V, while that of ordinary silicon transistors is around 0.6V. To reduce losses, fast recovery diodes are used.

If the reverse breakdown voltage of the fast recovery diode is 40V, it can quickly recover after reverse breakdown; If the reverse breakdown voltage of the fast recovery diode is 1000V, there is no problem of reverse breakdown, so this can be ignored in DC circuits.

Fast recovery diode is a semiconductor diode with good switching characteristics and short reverse recovery time, mainly used in electronic circuits such as switching power supplies, PWM pulse width modulators, and frequency converters.