Blue Sea Systems 5194 MRBF Surface Mount 3-Way Fuse Block - Independent Power Inputs

Price:  £60.41   (£50.34 Exc. VAT)

Product code:  P03973
Brand:  Blue Sea Systems
Ignition Protected  Yes



10 in stock

Blue Sea Systems MRBF Terminal FusesBlue Sea Systems MRBF Terminal Fuses

This 5194 surface mount 3-way fuse block from Blue Sea Systems accommodates three MRBF fuses for consolidated high amperage circuit protection. It contains 3 independently powered and isolated circuits suitable for use on high current loads such as primary battery feed, inverter, windlass, bow thruster, multiple output battery chargers, etc.

The clear clip-on cover satisfies AYBC/USCG insulation requirements, has breakout tabs for cable entry, and accommodates Blue Sea Systems square format labels for easy circuit identification.

The staggered-height terminal post design allows cables to enter and exit on the same side, or on different sides, to suit your application, and the one-piece stainless flange nuts ensure safe and secure connections. The isolated stud design electrically insulates the studs from the busbars so that all current flows through the fuses, and allows M8 terminals to be stacked on top of each other

This fuse block is ignition protected, making it safe to use in engine compartments around petrol.

Important: Only for use with Blue Sea Systems MRBF fuses. Fuses not included (see below).


  • Ideal for high power circuits
  • Ignition protected
  • Isolated stud design
  • 3 independent circuits
  • 240A per circuit max.
  • Versatile wiring options
  • Surface mounted

Further information

Fuses are available here. MRBF fuses are available in 30-300A ratings and have a high interrupt capacity to satisfy the American Boat & Yacht Council (ABYC) requirements for DC main circuit protection on large battery banks.

A common power input version of this fuse block is available here

  • Voltage rating (max.): 58V DC
  • Current rating (max.): 240A per circuit
  • Terminal Studs: 6 x M8 (5/16"-18)
  • Mounting holes: 4 x 5.5mm (for M5 screws)
  • Maximum torque: 100 in-lb (11.3 Nm)
  • Weight: 0.54 kg
  • Overall dimensions: 156.6 (L) x 64.2 (H) x 74.5 (W) mm
  • Ignition protected: Yes, when used with Blue Sea Systems MRBF fuses
  • Standards/specifications met: SAE J1171 Marine
  • Manufacturer's part no: 5194

Part Number:  5194B-BSS

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Blue Sea Systems

Blue Sea Systems is a US-based company designing and manufacturing high-quality components and accessories for the demanding environments of the marine and specialised vehicle markets. Its range consists of over 1000 products, designed to work together as a fully integrated system.

Business Hours: Mon - Fri | 9am - 5pm
CALL Sales & Support: 01844 885100
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