--- In
Homebrew_PCBs@yahoogroups.com, Stefan Trethan <stefan_trethan@...> wrote:
>
> You appear to be under the impression that fuses should be replaceable?
>
> Usually this is not the case, fuses are there to prevent fire and/or
> other danger if something goes wrong.
> Changing the fuse will not solve the problem, since it blew for a reason.
> You are supposed to throw the thing out once it is broken, not repair it. ;-)
>
>
The only place I've seen a "fuse" like this is in some compact fluorescent lamps, others use a low ohm fusible resistor for the same purpose. I've repaired them just because I can, using a replacement fuse of 0.5A or so or a small fusible resistor, naturally one also has to locate and replace the shorted component that blew the fuse in the first place.
The actual value is not so critical, it needs to be high enough to not blow under normal use, and low enough to blow before heavier traces or wires heat up, since the typical fault is a direct short, anything under a couple amps or so will blow in that condition.