12 Dec
2012
12 Dec
'12
11:58 a.m.
That rating is for UL purposes. The amount an open fuse air gap can
reasonable be expected to be an open circuit. The current is all that
really matters unless you go to a higher voltage, or have other issues
(such as transient high voltage which might cause an arc to start, then
sustain at a lower voltage).
Also FWIW, I think it is an RMS voltage rating they used.
household cartridge fuses are typically 600v.
I worked at Bussman testing fuses, and the reason the 600v was there was
mainly that was as high as their test rigs could go from the power
sources they had. Most of the circuits they are used in are way lower
than that.
jim
On 12/12/2012 10:59 AM, Chris Tofu wrote:
Are these by default 250v? Thats all Radio Shack
sells. I dont recall there being a voltage rating on the old ones.