gunrunnerjohn posted:I can't imagine a TVS doing this...
But it seems reasonable to assume that the purpose of the TVS is to protect the TIU electronics. So if a TVS fails (for example from repeated spikes from the track), then the previously protected FETs would be exposed to those spikes and possibly fail.
It appears the 10-cent FETs (free shipping from Asia) are now 16-cents.