By the way... For those who want to connect directly to a battery stud, this is a terrific fuse block and fuse system. Blue Sea also makes
. Both systems are a little pricey, but the robust design is first class.
Blue Sea Systems MRBF Surface and Terminal Mount Fuse Blocks
$44 USD on Amazon
Voltage Max Operating: 58V DC, Amps Max Operating: 300A per block & 240A per circuit, Terminal Fuses Avail.: 30A-300A, Terminal Stud Size: 5/16"-18 (8mm), Mounting Hole Size: #10 (5mm)
Surface mount fuse blocks accommodate three MRBF fuses for consolidated high amperage circuit protection
Safely provides power to three loads from a single source
Clip-on insulating cover satisfies ABYC/USCG insulation requirements
Versatile wiring options allow all wires to come out a single side
Label recesses accommodate Blue Sea Systems square format labels for easy circuit identification
One-piece stainless flange nuts ensure safe, secure connections
Ignition protected when used with Blue Sea Systems' MRBF Terminal Fuse
Fuses sold separately | Fit type: Universal Fit
Compatible with vehicle type: marine-personal-craft
Forum Discussions about this Product
1 - 5 of 5 Posts
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Maybe something like this ? lower profile would be better, maybe car stereo stuff, you want a inline fuse, closer the better.
Amazon.com: Blue Sea Systems 5191 Fuse Block Terminal 30-300 AMP : Automotive
Buy Blue Sea Systems 5191 Fuse Block Terminal 30-300 AMP: Fuse Boxes - Amazon.com ✓ FREE DELIVERY possible on eligible purchaseswww.amazon.com
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Can I ask why you went with independent class T fuses instead of something simpler like this on each battery?: https://www.amazon.com/Blue-Sea-Systems-5191-Terminal/dp/B0019ZBTV4/
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Joined·7,069 Posts
Class T fuse has 20kA AIC vs 10kA for the MRBF
AIC = amperage interrupt capacity
The maximum current the device can withstand and still provide protection. Basically in a catastrophic failure the ability of the circuit protection device to not get welded sut by an electrical arc.
https://www.bluesea.com/resources/96 -
Exactly what @njvagabond posted. The maximum interrupting capability of the Class T fuses is high enough to successfully interrupt a catastrophic fault. The batteries have internal BMS and (I presume) some fusing, but I've seen enough protection failures in my career to go belt and suspenders here. Maximum fault current is well-established for Lead Acid batteries, but lithiums have far lower internal resistance and can theoretically supply much greater current in a fault scenario.
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1 - 5 of 5 Posts
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