I want to accept an signal that could have any of the transients defined in ISO 7637-3 on it. It is a reset signal that could be tied to 24V in the case of a wiring harness meltdown but typically should be either floating or ground.
I was thinking of using the circuit below but I fear it may not be robust enough. (The arrow points to where the transients can couple )
So yeah, if this is exposed to ESD, +-24V (for 60s) or any automotive IO transients it needs to survive. What should I add/change?