Hey everyone! I'm on the hunt for a reputable MRBF fuse holder that can handle 400A. I've checked out options from Blue Sea and Bussman, but they only go up to 300A. The alternatives I've found on Amazon seem to come from sketchy brands that claim different ratings, some saying they can handle 500A and others stating 250-300A. If anyone has a good recommendation, I'd really appreciate it!
1 Answer
It's definitely tricky to find a good 400A MRBF fuse holder. While your goal is impressive, it's important to note that MRBF fuses typically don’t have the ICC rating required for setups with that kind of current. Make sure that whatever holder you choose can actually handle the specifications of your system!

I'm using a 12V, 304AH LFP battery for my 2500W inverter, and it handles short spikes up to 7500W too. My BMS can go up to 375A momentarily, so I feel you on needing something solid. Keep an eye out for legit ratings before deciding.