IMHO, my thoughts are zenner alone may be too weak, so i would rather use it in classical fashion in series with 100k resistor to gnd, so reverse biased zener will drive the base of a power transistor / igbt either way probably darlington config for gain speed, and would have the collector/emitter would do the effective clamping. Sry cant draw, im away and posting from phone. The cheap transistor / expensive igbt choice would probably be tradeoff speed vs leakage. And probably a to-220 package because less footprint. And that would have wide track, direct and isolated gnd path to gnd input as in priority star gnd routing, not a 16 mil track with 2 microvias. And also 2 fuses, one on each thermistor leg coz afterall can short either one.
Or, better to bring in a game changer. Perhaps can go with a high side driver with some current control and an inhibit signal that can be used to turn it off instead.
But still, honestly i wouldnt do either. Too many complications, too many components, increases the shield too much. And for what, just for the eventuality of a short.
Or, better to bring in a game changer. Perhaps can go with a high side driver with some current control and an inhibit signal that can be used to turn it off instead.
But still, honestly i wouldnt do either. Too many complications, too many components, increases the shield too much. And for what, just for the eventuality of a short.