Can rectifier diodes replace fast recovery diodes

First of all, we need to know that fast recovery diodes are also a type of rectifier diode. Of course, the replacement issue still depends on the specific situation.

Ordinary low-speed rectifier diodes cannot replace high-speed fast recovery diodes, while high-speed ones can replace low-speed ones.

Because the voltage changes too quickly during high-frequency rectification, if the forward conduction has not yet "recovered" to the cut-off state, the rapid arrival of reverse voltage will generate a large reverse current, increase circuit losses, and even burn out diodes.

So the replacement of rectifier diodes mainly depends on the parameters, so the specifications are more stringent than the actual parameters.