Hi folks,

I read about protecting the power supply with varistors. I googled a little
bit and gathered some information, but would like to hear your expert
oppinion.

I intend to connect this between the AC coming from a 16V step-down
transformer. What voltage will I need to select for the MOV ? The capacitor
after the rectifier bridge will be rated at 25V, so should it be 25V ? On
some specifications I see two values: "M-VARISTOR 14V 22V 250A". What is
their meaning ? Also, what current rating should I take into consideration ?

A final question, will I need to connect a fuse in series with one AC wire
to protect the varistor in case of a surge ? What value should have the fuse
for 16V AC ?

Thank you for responding !

Lucian

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