> Make that 'protect'... man It's been a long week....

And there's another one coming up. And another .....

Then it's Christmas with the family ;-( !!!

My understanding is that a TVS clamps *above* its rated voltage
and would not be effective below that, including -ve excursions,
rather like a zener. I believe a TVS has no Schottky region. I've
done a quick Google for 'under voltage protection device' but what
I saw were generally slowish protection circuits for PSUs etc, not
fast components like a TVS

Joe
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