Re: plus/4 informations

From: Dave R. (
Date: 2001-02-16 20:03:23

On Fri, 16 Feb 2001, Daniele Gratteri wrote:

> What does "fast acting" mean? Perhaps that, if there is a problem, the fuse
> will blow very rapidly?

Yes.  There are two varieties (that I know) of fuses, "slow blow" and
"fast blow".  They do, well, what their name implies.  A fast blow fuse
will blow with only a small spike above the voltage it's rated for.  A
slow blow fuse requires a high voltage for a little longer (still
less than a second usually) before it gives up the ghost.

Slow blow fuses are fine, maybe even preferable, for some applications if
the circuit being protected can handle a brief voltage spike.  But some
components, especially modern surface-mounted ICs, don't like anything
beyond what they're made to handle, and a fast blow fuse is a must for
these circuits.

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