Fuse -> DC & AC currents -> how to know the value?

[Just]

Hi All,

Most of the fuses in the market are rated for the AC current. So, how could I know the related DC current?

Thank you!

[Lollandster]

I doesn't matter because the AC current is rated at RMS and not peak so it is comparable to DC currents. Just remember that fuses can usually support currents upwards of 3 times its rating for short bursts because it is heat generated in the fuse that triggers it.

[Just]

Is a voltage rating for the fuses important? Why?

[MAGICPIE3FOCUSPOWER]

Yes you should not use DC fuses in AC circuit, this because the distance between the fuses pole.
To prevent flame sparking.....

[Just]

Actually I'm seeking for DC fuses... Are there such kind of fuses?

[MAGICPIE3FOCUSPOWER]

Yes just use car fuses.
If your want more amps fuses just look for car audio fuses.

E.g. ANL fuses are big amps guys!

[Morgen 3Eman]

The Voltage rating on a fuse denotes the value that will not be carried by arcing across a blown fuse.  For instance, if you had a 12 Volt rated fuse, and installed it in a 10,000 Volt circuit, if the fuse blew, the gap developed by the over current would not be large enough to prevent the 10,000 Volts from arcing over the gap.

There are fuses that have different Voltage ratings for DC and AC.   I'd Google the current and Voltage of the circuit you wanted to protect, and look at the results from vendors. 

TTFN,
Dennis

[Just]

Yes you should not use DC fuses in AC circuit, this because the distance between the fuses pole.
To prevent flame sparking.....

As for the AC fuses in DC currents, is it okay?

[MAGICPIE3FOCUSPOWER]

Yes.