> For that reason, I am still curious if a ferrite bead added to the Voltag=
e Input
> would be prudent, assuming the choice of a 600W TVS is deemed inadequate
> for shunting the Load Dump spike.  I know this question isn't completely =
the
> same as "Static damage prevention" but the dialog in this thread brought
> Load Dumps to mind, as well as the current designs I am reviewing.

A ferrite bead will help to slow the dV/dt at the TVS, and hence protect it=
 from some of the dissipation shock, if you can put a ceramic bypass cap in=
 there as well, that will help even more.

A ferrite bead will also help with keeping the worst of the high frequency =
alternator noise out of the electronics.

To me it is a simple minimal cost solution that won't provide much in the w=
ay of series impedance at DC.

--=20
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