Mostly a follow up to https://electronics.stackexchange.com/questions/175778/rc-snubber-across-switch-or-inductor…
I've seen RC or RCD snubbers across the switching MOSFETs (and these damp the dV/dt on the VDS keeping the FET in SOA during turn-off). Also help with body diode reverse recovery during commutation.
I've also seen RC snubbers across the load (DC motor, for example); RCD is not feasible if the drive is bidirectional; these would damp the dV/dt on the motor and also give a slighly filtering effect on PWM EMI.
Is there in practice a difference between them (other than the amount of devices since there would be four switch snubbers…) or they actually serve different purposes?
I've also seen applications where both were put in place but I think that's overengineered (why both?)
