I'm trying to do an SRM450 v2 repair with blown Q11 AND Q12 but I'm having a hard time finding IRFB31N20D replacement MOSFETs that aren't fake. What is everyone using as a direct replacement for the MOSFET with a 47-ohm gate? Another component I'm having a hard time finding is a MOSFET gate pin Ferrite Bead, BOM part "MAG FERRITE BEAD 4X2X5.0MM W5". I've found a few forums referencing substitute but no one has confirmed if the subs work. Digikey is my go-to for parts.
