BOJACK MEGA/AMG High Current Fuse Bolt-on Fuse 100A Amp for Cars, Trucks, Construction Vehicles, Buses, Caravans (Pack of 2 ANM Fuses 100A)

Good quality

They run almost cold at high currents

I wanted to know the fuse will actually open at a sensible current, so I bought 2x 100A and popped one by putting it in the ground circuit for a TIG welder. It withstood 15 seconds at 160A. I gave it a short pause and then it popped in about 7 seconds at 170A. This is roughly what I would expect. The picture shows plastic melting on one side - it started within seconds at 130A. This does not reflect badly on the fuse itself, it shows that the poor connection with the 60mm battery clip is generating a lot of heat. The big welding ground clamp on the right makes a firmer connection and there was no melting. Other info from the disassembly: it contains a nice little mica window which cleaves beautifully.