Re: snubber resistor power rating?
From: John Popelish (jpopelish_at_rica.net)
Date: 11/29/04
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Date: Sun, 28 Nov 2004 22:25:28 -0500
Harry Dellamano wrote:
>
> >> Ken Smith wrote:
> >>
> >> IRC (the company, I do Recall Correctly) make some great smt resistors.
> >> And have peak pulse power curves.
> >
> > Caddock does too:
> > http://www.caddock.com/Online_catalog/smt/smt.html
> >
> > --
> > John Popelish
>
> Caddock is a perfect example of a poor surge (Pulse) power resistor. They
> are thin film and X1.5 rated peak power. A good surge rated resistor is
> X5000 or maybe 5 Joules. Call Richard Caddock and see if they speak in
> Joules.
But that 1.5 factor is allowed for 5 seconds. I was assuming that
from an I^2*t fusing effect that the dissipation capability would go
up quite a bit if the time was in milliseconds.
-- John Popelish
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