SKU: 90652803515

Blue Sea 30-300A Marine Rated Battery (MRBF) Dual Terminal Fuse

Sale price$54.82 Regular price$60.91
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Description

Blue Sea 30-300A Marine Rated Battery (MRBF) Dual Terminal FuseSpace Saving High Amperage Circuit Protection *Please note Blue Sea fuses are manufactured by Eaton, Bussman or Ionnic and may have labelling of one of these manufacturers on the product and or packaging. The Blue Sea Marine Rated Battery (MRBF) Dual Terminal Fuse Block solves one of the most common challenges in marine and automotive electrical installations: limited space. By mounting directly onto the battery terminal, this fuse block eliminates

Space-Saving High-Amperage Circuit Protection

*Please note Blue Sea fuses are manufactured by Eaton, Bussman or Ionnic and may have labelling of one of these manufacturers on the product and/or packaging.

The Blue Sea Marine Rated Battery (MRBF) Dual Terminal Fuse Block solves one of the most common challenges in marine and automotive electrical installations: limited space. By mounting directly onto the battery terminal, this fuse block eliminates the need for short, difficult-to-install cable runs between the battery and a traditional firewall-mounted fuse holder. This design not only saves valuable room in crowded battery compartments but also reduces resistance and potential failure points in your high-current cabling.

Engineered for demanding environments, this unit is ideal for protecting high-load circuits such as inverters, windlasses, and bow thrusters. With a maximum voltage rating of 58V DC, it is perfectly suited for modern 12V, 24V, and 48V electrical systems found in boats, caravans, and off-grid 4WD setups.

Direct Battery Terminal Mounting

The primary advantage of the Blue Sea Marine Rated Battery (MRBF) Dual Terminal Fuse Block is its ability to interface directly with the power source. It is designed to mount securely onto a standard 3/8" (Approx. M10) battery terminal stud. By fusing the circuit right at the battery post, you ensure maximum safety; if a fault occurs in the main cable running to your equipment, the fuse will blow immediately at the source, preventing potential fire hazards associated with unprotected live cables.

Versatile and Robust Design

Constructed with marine-grade materials, this fuse block is built to withstand the harsh conditions of the Australian outdoors. The hardware includes stainless steel studs and tin-plated copper bus bars for maximum conductivity and corrosion resistance. The unit features M8 (Approx. 8mm) studs for connecting your load cables, accommodating heavy-duty lugs and cabling required for loads up to 300A.

Safety is paramount in high-current applications. The included insulating cap prevents accidental shorts across the conductive terminals, satisfying ABYC/USCG requirements for insulation when installed correctly. The versatile design allows for flexible cable orientation, making it easier to route heavy gauge wire in tight lockers.

Dual Circuit Capability

This model features a dual-terminal design, allowing you to fuse two independent circuits from a single battery post. This is exceptionally useful for running a main DC switchboard feed and a separate inverter charger feed from the same battery bank without stacking multiple ring terminals on the battery stud.

Key Features

  • High Interrupt Rating: Safely handles high amperage loads up to 300A.
  • Compact Footprint: Mounts directly to 3/8" (Approx. M10) battery studs, saving panel space.
  • Voltage Versatility: Rated for 58V DC, suitable for 12V, 24V, and 48V systems.
  • Secure Connections: Uses M8 (Approx. 8mm) output studs for secure cable termination.
  • Safety Cap: Insulating cap protects against accidental short circuits.
  • Corrosion Resistant: Tinned copper and marine-grade stainless steel hardware.

Whether you are refitting a yacht or building a custom tourer, the Blue Sea Marine Rated Battery (MRBF) Dual Terminal Fuse Block provides professional, reliable, and neat circuit protection exactly where you need it.

Secure your high-current electrical system today with this compact terminal fuse solution.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 90652803515

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Derrick
Los Angeles, US
★★★★★ 5
Works great for my application.
Size: 6Ft-without USB
This power strip saved me a lot of trouble. I used it to power my Its a Wonderful Life Village, which is composed of 22 buildings each with its own lamp. I went from four power strips to one with this unit. It made the wiring so much neater.
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Reviewed in the United States on January 3, 2026
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MAJ34
Charlottesville, US
★★★★★ 5
A must have power strip!!!!!! Highly recommend.
Size: 6Ft-without USB
I purchased this during Prime Days in July for $18. There were multiple reasons I purchased this power strip. The list is as follows: The plug is flat to the electrical socket The plug rotates, which makes it so easy to plug into any socket and there have been many times I could not use a power strip because of the socket availabilty. There are sooo many places to plug in anything and they are far enough apart that you can use smart plugs with ease. The cord I purchased had a 6 foot cord, plenty of room to place the strip behind anything and have room to get easy access. This strip is at 4,000 Joules, which is very good surge protection. For the price point, even if it is not on sale, would be worth the purchase. This is a must have in this day and age of power needing devices. P.S. I would have purchased a Amazon strip, but they were “not available” during the Prime days sale.
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Reviewed in the United States on July 31, 2025
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G. Gonzales
Pawtucket, US
★★★★★ 4
Extension cord
Size: 6Ft-without USB
Was nice while I was renting an older home with very little outlets.
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Reviewed in the United States on March 7, 2025
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P M K
Belleville, US
★★★★★ 5
For anywhere you have a lot of electronics
Size: 6Ft-without USB
I have everything on my desk plugged into it. Sometimes I have to push hard to get the plug in, but the surge protection makes it worth it.
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Reviewed in the United States on April 1, 2026
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darryl jones
Louisville, US
★★★★★ 5
Easy
Size: 6Ft-without USB, Size: 6Ft-without USB
I like it more room
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Reviewed in the United States on April 17, 2026

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