[TechAssist] Re: Question - internal 120V AC line varistors- surge suppressors

  • From: Al Gutz <alg@xxxxxxxxxxx>
  • To: techassist@xxxxxxxxxxxxx
  • Date: Tue, 09 Dec 2003 23:12:50 -0500

Gary
 Global catalog page 391  #MOV-130 price $1.30ea. If you want to order
in quantity at a better price let my know and I will give you a
different number, I buy them for about $.45 ea.
I add one of these to sets that where not originally equipped with a
surge portect.

Al G

Gary McCartney wrote:
> 
> In general, what is a good quality and rating of a varistor to use at
> the 120V ac input of equipment where the varistor (surge suppressor) has
> been blown up by a power surge?
> 
> Example, I have a Brother Intellifax 1270 fax machine that came in , hit
> by a power surge. I found the varistor at the 120V AC power input (Z1 on
> the power supply board) blowed up real good, along with the fuse which
> was black as coal. These were the only faults as the fax machine works
> now, however I don't know what varistor to use in place of the original.
> Whatever the part was, it did a great job at protecting the power
> supply. I will let the machine run awhile after repair in case the
> mosfet switcher transistor was stressed in the action.
> 
> What would be the recommended voltage and amperage surge rating to
> replace the original with, perhaps purchased from Digikey or other
> similar generic parts supplier?
> --
> 
> BTW, I titled the message the way I did because I thought I'd get more
> responses than if I titled it, "brother fax machine....etc, etc.......)
> 
> Thanks for any help.
> 
> Gary McCartney
> 
> McCartney Electronics
> Guelph Ontario Canada
> Est. 1984
> email: gary (at) number63.ca
> 
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