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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★★★★★ 5
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Reviewed in the United States on May 18, 2026
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★★★★★ 5
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Size: X-Large, Color: Black
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Reviewed in the United States on May 27, 2026
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Bling Xpress
Phoenix, US
★★★★★ 5
True as advertised
Size: X-Large, Color: Wine Red-2, Size: X-Large, Color: Wine Red-2
Great fit, true to size. I am 6'2" 217 lbs and bought the XL. The color is just as expected and the cut feels and looks tailored. This suit looks like aand feels expensive while being extremely budget friendly.
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Reviewed in the United States on November 16, 2025
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Billy Griffin
Cuba, US
★★★★★ 4
5’-11”, 185 lbs, Size- Large
5”-11”, 185 lbs, size Large. Suit jacket fits good and has some weight to it. My chest is a little bigger proportionally for my size but if I go with a size up, the jacket would be too big. Vest fits good but appears to be XL though it is labeled L. Not a big deal. Pants are also a good fit. Waistband is not too tight or too loose around my waist. Pant length is a little long but still a good fit. I normally wear 34x34 pants.
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★★★★★ 5
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