MOV's

• To: tesla-at-pupman-dot-com
• Subject: MOV's
• From: "Christopher Boden" <chrisboden-at-hotmail-dot-com> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Tue, 22 Feb 2000 18:04:10 -0700
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

As I understand it a MOV (Metal Oxide Varistor) is basically a whomping 
Zeneer Diode in essance. It does nothing untill you reach a prescribed 
voltage, then acts as a short circuit. A hogh voltage gate essentially. Am I 
wrong?

Assumeing I am right (hey, this is my dream remember?) then how is this 
different than a spark gap?

Do they reset after use? or simply short out and need to be replaced.

If these behaive like a gap, then why use them in place of a gap in an NST 
protection circuit? pros/cons?


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