Electronics > Beginners

Looking for a good transient suppressor circuit?

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Kremmen:
Yep i never checked my calculations after making them like 1:30 am and us vs MW should produce joules now that i think about it. So you must be right.
As to the voltage the MOV sees in real life - it is practically hopeless to try and calculate. Every installation is unique and the indicated resistances and impedances are just those used as "official" values.
The MOV curve was not really meant to represent any single physical device so don't read it with calipers in hand. :) I drew that curve off the cuff at the same time i wrote the text.
At exactly the limit voltage a MOV will pass a small current but at that point it will also trigger into conduction where the resistance drops sharply. I did the calculations in the defensive way that produces results that are maybe biased towards the overkill. But at least the devices won't evaporate at the first surge.

Christe4nM:
That's a well written paper Kremmen  :-+
Thanks a lot!

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