[TechAssist] Re: Question - internal 120V AC line varistors- surge suppressors
- From: "J Silverman" <greentron@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 10 Dec 2003 13:29:03 -0500
They are rated in AC volts, joules, and number of times they can withstand
absorbing that number of joules. You buy the highest number of joules you
can afford that will fit in the space allotted. Or you can leave it out and
buy a seperate box with surge suppressors, noise filters, and fuses or
breakers.
Jerry Silverman
Greentron Inc
4 Newland Ave
Greenville SC 29609
864 232 3889
Fax 271 2080
mailto:greentron@xxxxxxx
----- Original Message -----
From: "Gary McCartney" <gary@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, December 09, 2003 7:24 PM
Subject: [TechAssist] Question - internal 120V AC line varistors- surge
suppressors
> 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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