The reverse recover time (trr) specification is very dependent upon the circuit and the conditions being used to make the measurement. Several industry standard trr test circuits exist (Figure 2 is the test circuit used for the GP02-40). Therefore,
it’s very important to note which test circuit is being referenced, as the same device may measure
differently on different test circuits. Furthermore, the trr specification should be used for qualitative, not quantitative purposes, since conditions specified for trr measurement rarely reflect those found in actual “real life” circuit operation.
The trr specification is most valuable when comparing two or more devices that are measured on the same circuit, under the same conditions.