need a quick fuse lesson

[no spam for me]

I need to get myself a 125V 5A 1/4" fuse tomorrow since I did not have the
guts to put a 250V 5A in place of it. I need a refresher here....why
shouldn't 5A =5A .....I can't remember what fuses failure is based on?
Resistance or temperature??

 

[James Sweet]

I need to get myself a 125V 5A 1/4" fuse tomorrow since I did not have the
guts to put a 250V 5A in place of it. I need a refresher here....why
shouldn't 5A =5A .....I can't remember what fuses failure is based on?
Resistance or temperature??

250v is fine, the voltage rating is the maximum voltage that the fuse can
safely interrupt, you could use a 5A 25,000v fuse here and it would work
just fine and be perfectly safe, but a waste of a very expensive fuse in
that case.

 

[Robert Grizzard]

250v is fine, the voltage rating is the maximum voltage that the fuse can
safely interrupt, you could use a 5A 25,000v fuse here and it would work
just fine and be perfectly safe,

Assuming it fit in the available space.

but a waste of a very expensive fuse in
that case.

Agreed.