Fatal error: Timestep too small (1.25e-19) at t=0

@awais.muhammadi Well, this is not the first time I have seen Qspice have a hard time resolving an Infineon model. Infineon describes a MOSFET with many equations, making it hard to figure out what is causing the challenge. Maybe you can copy the netlist and model file to Mike for review, provided this model can run in LTspice. I am just not sure how Mike feels about this kind of model. Even if LTspice can run this netlist, it may encounter issues if the circuit is set up another way.

I modified the netlist and it can run, but it is very slow.

netlist.cir (497 Bytes)
SiC-MOSFET-AUTOMOTIVE_1200V_AIMBG120R010M1_L3.lib (18.4 KB)