Recent score: CBM 8032

From: Pat Finnegan <pat_at_purdueriots.com>
Date: Thu May 23 23:41:55 2002

On Thu, 23 May 2002, JP Hindin wrote:

>
>
> On Fri, 24 May 2002, Tony Duell wrote:
> > Firstly, ignore the '125V' part of the spec. That's just the maximum
> > voltage the fuse is designed to break safely. Most modern fuses are 250V
> > at least. Use one of those (of the same type and current rating). It'll
> > work just the same.
>
> Although I'm no expert in the area, but wouldn't that mean that if the
> voltage spikes the fuse won't catch it, making the CBM just as dead as if
> there was a current spike?

No, fuses don't catch voltage surges, just current surges. VAR's (a sort
of voltage-controlled resistor - a semicondutor, used in surge
protectors), are what 'absorbs' voltage spikes.

Like Tony was trying to say, the voltage rating is the maximum voltage on
which you should use the fuse.

> > Secondly, when you sat 'around that', what do you mean? 1.75A (if you can
> > get that) would be fine. 2A would probably be OK, at least for testing
> > (it would burn out in the event of a serious short, and to be honest a
> > 1.6A fuse is not going to give much more protection). A 1.5A fuse might
> > hold -- it's worth trying.
>
> Mouser had 1.6A 250V slow-blow fuses, Radioshack a 0.125A 125V and 3A 125V
> ... I forget what Newark had.
> They're all kinda close, but not quite.

1.6A 250V is about as perfect a match as you'll get.

-- Pat
Received on Thu May 23 2002 - 23:41:55 BST