1 KV surge, IEC 61000-4-5.
Hoping to be able to replace 0805 1 nF caps for better surge immunity on already made pcb's.
Currently all I have is 1nF/50V to gnd, ferrite bead, 1nF, 10K series, and then diode clamps to Vcc/gnd.
Perhaps this is good enough, I don't know yet, just looking for options in case this fails.
The above components divert surges to signal gnd, which floats vs chassis gnd.
I would like to divert to chassis, but I also have a Hi-Pot requirement of < 0.5 mA leakage
to chassis gnd at 710 Vdc between signal gnd and everything else tied together.