Car fuse, how does it work and can I use the one mentioned below?

Question

Hello,

I'd like to install a fuse in front of my car amplifier (Crunch 800W) and was thinking about installing a car fuse to protect against short circuits ( https://www.reichelt.de/kfz-sicherung-megaoto-100-a-32-v-gelb-imaxx-mgp100-p229138.html ). But will it simply blow and I'll have to replace it? Is it suitable for my needs (I don't think 100 amps should be reached at 800W)?

LG

gehilfling · Answer

Yes, automotive fuses are quite normal fuses. If the permitted current is exceeded long enough, a part intended for this purpose melts and interrupts the circuit.

At 12 V, 66.6 amperes would flow at a constant 800 W. A 100 A fuse would thus last.

bastibrot · Answer

There are 6 20 AH lead batteries that should also trigger the fuse in a short circuit, aren't they?

gehilfling · Answer

Depends on their maximum current. But if you have switched all 6 in parallel, then the already enough power should deliver in the short circuit that the fuse flies.

bastibrot · Answer

OK

peppie85 · Answer

no longer. I mean the 1000.4 of crunsh has 2 safeunegn a 25 ampere or something. Look what the end stage has to secure, and then take a bigger.

for the security you're looking out there is also the appropriate holder, which I would recommend so that you don't break away if the security comes somewhere and b.) doesn't break or break away from the security.

best regards, Anna

PS: I would also put the mass cable back to the battery to avoid mass grinding. the body is not as good as many believe. steel leads 7 times worse than copper and the carousel is usually welded together only at a few points.

wollyuno · Answer

with safety should/must trigger them otherwise rises smoke on