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Blue Sea 5191 Battery Post Fuse Holder

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  • Blue Sea 5191 Battery Post Fuse Holder
  • Blue Sea 5191 Battery Post Fuse Holder Diagram

Blue Sea 5191 MRBF Battery Terminal Fuse Block

SKU: BS-5191
Places the fuse right at the battery

Availability: In stock

Product Description


    These fuse blocks attach right to your 5/16" battery post, and accept connections with a 5/16" lug. Fuses are not included.

    There are a number of reasons to use this fuse holder:
    • It is the most compact way to mount a fuse, as long as you have an extra inch above your battery posts.
    • It alleviates having to make up a short wire to connect a standard fuse block to the battery.
    • It makes it 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 300 amps.
    • 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.
    • 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' MRBF Terminal Fuse
    • Isolated stud design uses standard M8 hardware and permits stacking of terminals
    • Insulating cap prevents accidental shorts
    • Accepts 5∕16" ring terminals
    • Fuse sold separately


    For fuses, see the fuses page. A two-fuse model is also available.

Additional Information

    Additional Information

    Manufacturer Blue Sea
    Data Sheet No
    Product Manual No
    Warranty No