reverse recovery softness factor (RRSF)

The absolute value of the ratio of (1) diRR/dt (the rate of rise of the reverse recovery current) when the current is passing through zero at the beginning of the reverse recovery time, to (2) diRF/dt (the maximum value of the rate of fall of the reverse recovery current) after the current has passed through its peak value, IRM.

NOTE The ratio of reverse recovery current fall time (tb) to the reverse recovery current rise time (ta) has been called "recovery softness factor" (RSF); however, RRSF is a more useful measure of the diode softness characteristic.


JESD77-B, 2/00
JESD282-B, 4/00