atta boy… buying one fuse is just plain foolish…
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I can only ship one at a time, more won’t fit in the packaging.
If you order too many, then just get them from Mouser. But at $0.65 each plus $12.00 shipping, it doesn’t make sense to buy one. That’s where I can help you.
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Yes, $2 shipped to USA only with no tracking number.
If it doesn’t show up in 3 weeks I will refund you.
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For those in EU, look here
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Why would it matter if a fuse is 60 volts vs 12 volts. Other then the amp rating being adjusted with the thickness of the metal that blows?
It can arc over a blown fuse if the voltage rating is too low. But those are extreme edge-cases and in general it’s not really a terrible thing to exceed the voltage rating of a fuse. As long as you’re not exceeding it by orders of magnitude or anything.
It’s better to use a 12V automotive fuse on a 50V charge port — than to not use a fuse at all.
The fuses above are 58V rated fuses though, to be clear
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What you mean is even though the fuse blows at the current rating it’s supposed to blow, it blows and still leave the Gap that’s jumpable.
Yeah Ive never seen 12 to 20 series packs arc,
I wonder how close as far as microns for that occur with DC under 100 volts
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Yes
I usually put it on negative but either one works
If you’re bypassing the BMS, here is a diagram
But it looks like you might not be running in a bypassed configuration. Not sure.
Yeah that’s bypass configuration
Yes, put it on that negative wire, all good
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That’s overkill 
I usually just solder it on the wires and epoxy it inside the enclosure then go over it with sealant
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Not much had been posted here for a while, just checking to see if your still mailing these out…
I’m assuming that a 58v fuse is fine for a pack running a lower voltage, say… a 10s 36v pack?
Or would it not blow at the rated 7.5a?
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5A fuse will blow at 7A and 1v
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Well yeah, he does mention that these 7.5a fuses he recommends maximum 4a…
But does voltage difference from it’s rated use case have an effect on that Amp rating? I assume not, as most people don’t run like… 14s-15s packs 
Yeah you can use the 7.5A fuses for up to 7A or so but I wouldn’t go above 5A without switching to a larger fuse. Just me personally. You’re not trying to blow the fuse. Rather, it’s a safety net.
The voltage rating on fuses is rather insignificant. You can use a 12V fuse for a 50V battery if you want to. It’s better to use a 58V fuse, but the amperage is really what matters, within reason. You can’t use a 12V fuse on a five kilovolt battery.
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