Snubbers are usually applied to dissipate the energy in reactive transitions. If you use a capacitor
only,
it will tend to form a resonant circuit that can ring. It's good to have some resistance (loss) to
convert it
to heat, and quickly damp it out. The resistance also limits the peak currents in the loop.
For what it is worth, Quad (the audio company) used to use a RIFA 100nf/100ohm X2 snubber across the
switch output. In other words not across the switch. That was present in the 33 preamp and FM4 tuner
at least, and probably on more products too.
Now I would not recommend a RIFA part, because the epoxy casing splits and they emit massive amounts
of smoke (plenty in the archives about this), but there are other manufacture snubbers of the same
values out there.
Craig
