2007-04-10 03:03:11 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
The key "word" is "DC". AC reverses often, which helps an arc extinguish. DC keeps going, which can be harder for a device to interrupt. Sometimes the fuse catalog has different ratings for different voltages, currents.
2007-04-10 03:16:19 · answer #1 · answered by A Guy 7 · 0⤊ 1⤋
I really can’t believe some of these responses. I check out the cultural notes and they're kind of fun with everybody’s opinion but this type of advice could get somebody injured. The 1 amp rating is for current supplying the load. The 12 Volt rating (capital V designates DC voltage) has nothing to do at all with the amount of voltage that the fuse can handle. It designates that if this fuse “blows” that it will take more than 12 volts to arc across the open circuit. Putting a 1 amp, 12-volt fuse into an 800ma, 240-volt circuit would be like putting no fuse in at all; you may as well stick in a penny or a nail. The potential voltage would cause arcing across the open fuse, this could at the very least be damaging to the equipment and at the most be dangerous to life and property.
2016-05-17 03:47:20 · answer #2 · answered by ? 3 · 0⤊ 0⤋
Yes. It has the ability to stop the specified amperage. It also has the ability to not burst open from the heat of the link exploding on a short circuit and to not arc across the broken internal link at a voltage as high as 240 volts. Using it on only 12 volts is not a problem at all.
Going the other way (using 12v fuse on 240V) is a very bad idea.
2007-04-10 03:57:50 · answer #3 · answered by Rich Z 7 · 1⤊ 0⤋
Good question. First of all, is your fuse rated at 240V AC or 240V DC ? If it's a DC fuse, then it should work. Fuse works on the principal that the conductor gets heated with the increase of current because P = i^2 R. When sufficiently heated, the conducor burns out and the circuit gets disconnected. So theoritically, the fuse should cut off at a certain current, independent of the voltage.
Hope this was helpful.
2007-04-10 03:14:41 · answer #4 · answered by rhapsody 4 · 1⤊ 1⤋
Yes it is the current that operates the fuse.
However fuses are designed. The characteristics vary.
i.e. slow blow, high rupture capacity, fast blow etc. and you should chose a fuse that was originally supplied to protect the device.
2007-04-10 09:22:58 · answer #5 · answered by mad_jim 3 · 0⤊ 0⤋
yeah, its the current that tips the fuse not the voltage
2007-04-10 03:21:33 · answer #6 · answered by quertbarbie62 3 · 1⤊ 0⤋
Yes, there are very few fuses that are actually voltage dependent.
2007-04-10 03:09:54 · answer #7 · answered by uisignorant 6 · 1⤊ 1⤋