TCMTECH
Thanks so much for the help.
Would this one work? It is a to-247 like my wfw20N50.
International Rectifier
Manufacturer Part No. IRG4PC50UPBF
UltraFast Insulated Gate Bipolar Transistor
Marked on part: G4PC50U
G4PC50U Specifications
Input Type: Standard
Voltage - Collector Emitter Breakdown (Max): 600V
Current - Collector (Ic) (Max): 55A
Vce(on) (Max) @ Vge, Ic: 2V @ 15V, 27A
Power - Max: 200W
Mounting Type: Through Hole
Package / Case: TO-247-3 (TO-247AC, Straight Leads)
Lead Free Status: Lead Free
RoHS Status: RoHS Compliant
Would I just unsolder my MOSFETs and replace with these? Do I just replace the 12 on the top board or also the ones on the bottom?
Bill