Question

fuse (glass) 5 a 250 v dia : 5*20 mm h.r.c filled w/silica

Answer 1

It's easy to tell if a glass fuse is blown; it will show scorch marks, and the filament will be melted. To check a ceramic fuse, use an ohmmeter or continuity tester. With an ohmmeter or multimeter, you should see a reading close to zero ohms if the fuse is intact, or infinite if it's blown.

Answer 2

You can replace a 125V fuse with a 250V fuse of equal amperage as long as the application voltage is 250V or less. ... You can not replace a 250V fuse with a 125V fuse of equal amperage if the application voltage exceeds the 125V.