These fuse blocks attach right to your 3/8" threaded rod or threaded insert battery post, and accept connections (on top of the fuse) with a 5/16" lug. Fuses are not included.

There are a number of reasons to use these fuse holders:

• This is the most compact way to mount an MRBF fuse, as long as you have an extra inch above your battery posts
• They alleviate the hassle of having to make up a short wire to connect a standard fuse block to the battery
• They make it very easy to comply with the ABYC rule requiring unsheathed wires to have a fuse or breaker within 7" of the battery post

Reasons not to use these fuse blocks include:

• They handle a maximum of 300A per fuseblock - do not install two 300A fuses on a dual MRBF holder!
• Replacement fuses are not as common as ANL or Class T fuses
• MRBF fuses are more expensive than ANL fuses, but less expensive than Class T fuses

Features:

• Compact, high-amp fuse—appropriate for DC Main, inverter, windlass, and bow thruster circuit protection
• Provides high current protection in tight space constraints
• Ignition protected when used with Blue Sea Systems or Bussmann MRBF Terminal Fuse
• Isolated stud design uses standard M8 hardware and permits stacking of terminals
• Insulating cap prevents accidental shorts
• Bolts to 3/8" threaded rod or terminal insert of battery
• Accepts 5/16" ring terminals on top of fuse
• Fuse sold separately
• 75 in-lb (8.47 Nm) maximum torque on fuse side; refer to your battery manufacturer's recommendations for maximum torque on battery side 

Available in single- or dual-fuse design; select your model above!