T_Roze
Well-known member
Last month I went on a mild eBay shopping spree. Picked up a whole bunch of minor electrical odds and ends; alligator clips and the like. One of the vendors had a mini fuse combo pack of 120 mini fuses for around 8 bucks. Coming from China, I was sceptical on the quality of them, but I figured it would be a fun little experiment to see how close to the rated amperage they actually were. They are the box on the right. The left is a box of tried and true fuses, largely pulled out of wrecked vehicles.

So work was slow today, and I had some time to fart around. Pulled out my newly received fuses, as started to play. First off, the fuses look sketchy right from the get go. A Normal mini fuse has a very fine wire in between the two spades. These fuses look like they are just stamped out of the same material, spades and wire combined. I started by testing the ten amp fuse. Hooked a ten amp eBay fuse in series with a ten amp known good fuse behind it. Then hooked them up to 12v. Blew the good 10a fuse. I subsequently blew 15a, 20a, 25a, and 30a known good fuses. All the while the 10a eBay fuse remained intact.

Since I was going, I hooked a 5a eBay fuse inline with a 30a known good fuse. Pop went the 30a fuse.
So my new tool arrival is now in the garbage, except for the case. Can't say I am really surprised, I wasn't expecting much. But for a "5a" fuse to carry over 30a, that's a new level of poorly made Chinese garbage.
I got to find a variable resistor that can handle enough current to find out how much this 5a fuse can actually carry. I am guessing by the gauge of the strand of fuse material inside it's probably close to 50a.
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So work was slow today, and I had some time to fart around. Pulled out my newly received fuses, as started to play. First off, the fuses look sketchy right from the get go. A Normal mini fuse has a very fine wire in between the two spades. These fuses look like they are just stamped out of the same material, spades and wire combined. I started by testing the ten amp fuse. Hooked a ten amp eBay fuse in series with a ten amp known good fuse behind it. Then hooked them up to 12v. Blew the good 10a fuse. I subsequently blew 15a, 20a, 25a, and 30a known good fuses. All the while the 10a eBay fuse remained intact.

Since I was going, I hooked a 5a eBay fuse inline with a 30a known good fuse. Pop went the 30a fuse.
So my new tool arrival is now in the garbage, except for the case. Can't say I am really surprised, I wasn't expecting much. But for a "5a" fuse to carry over 30a, that's a new level of poorly made Chinese garbage.
I got to find a variable resistor that can handle enough current to find out how much this 5a fuse can actually carry. I am guessing by the gauge of the strand of fuse material inside it's probably close to 50a.
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