Fuses and matching specs

Zud

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I have a question about fuses. If the manual calls for say an 8A Slow Blow 125V, can you use a 250V? Or will that not cause the fuse to blow if it is supposed to?

While fixing my simple problem on my Atari Football, I bought some extra fuses for my stash. I noticed some are 250V requirements while others are 125V. I only when to Crapshack and they do not have 125V at all.
 
Using a higher voltage rated fuse is OK. Do not use a lower voltage rated fuse or a higher amperage rated fuse unless you are prepared to do some damage.
 
What Oryk said.

For reference, fuses are like caps. The current (A) is their rated service capacity, while the voltage is the point at which the insulation/device starts to break down. For example, a 12V fuse and a 250V fuse rated for 10A are both be capable of carrying 10A, but the 12V fuse may have legs (or windings) that are close enough together to arc at 250V. If it arcs, electricity is bypassing the fuse. So you could use the 250V fuse in the 12V application, but not necessarily vice-versa.
 
I have a question about fuses. If the manual calls for say an 8A Slow Blow 125V, can you use a 250V? Or will that not cause the fuse to blow if it is supposed to?

While fixing my simple problem on my Atari Football, I bought some extra fuses for my stash. I noticed some are 250V requirements while others are 125V. I only when to Crapshack and they do not have 125V at all.

Amperage and fast acting or slow blow also called time delayed is what needs to match voltage can be higher but not lower than spec's without causing any problems.
 
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