Fuses-&-Fuse-Accessories > Fuse-Holders-&-Fuse-Adapters

Marine Rated Battery Fuse Blocks - 58V DC, 300 Amp

Marine Rated Battery Fuses

Marine Rated Battery Fuses Marine Fuse Holder Marine Fuse Holder Fuse Holder Cover

Our weatherproof terminal fuse blocks can withstand many harsh environment conditions. The red santoprene covers, also known as insulating caps, prevent accidental shorts.


  • Voltage Max: 58VDC. Amperage Max: 300A.
  • Housing & Cover: UL-rated 94V0 Thermoplastic.
  • Ring Terminals: Tin Plated.
  • Terminal Stud Size: M8.
  • Mounting Hole: 3/8".
  • SAE J1171 ignition protected.
  • Fuses sold separately; use with fuse parts 78976 to 78989.
  • Hardware not included.
Item Description Price
1+ I Ext. Price I 20+ Ext. Price I I 50+ Ext. Price I
Qty in
Package 		In Stock Add to Cart
78990 Eaton Bussmann CFBAR1-M8XSP, MRBF Terminal Fuse Holder, 1 Fuse, 300 Amp, 58V (1 MIN)
16.21800 16.22 I 14.97600 14.98 I 13.04100 13.04
1 EA Call
78991 Eaton Bussmann CFBAR2-M8XSP, MRBF Terminal Fuse Holder, 2 Fuse, 300 Amp, 58V (1 MIN)
14.98700 14.99 I 13.51700 13.52 I 11.41600 11.42
1 EA ✓
78992 Eaton Bussmann CFCOVER-1R, MRBF Red Santoprene Cover for Single Stud Holder (1 MIN)
1.86300 1.86 I 1.60400 1.60 I 1.26300 1.26
1 EA ✓
78993 Eaton Bussmann CFCOVER-2R, MRBF Red Santoprene Cover for Double Stud Holder (1 MIN)
1.89400 1.89 I 1.54200 1.54 I 1.20100 1.20
1 EA ✓

Blue Sea Systems Marine Rated Battery Fuse Blocks - Independent Source

Marine Rate Fuse Block

This Blue Sea Systems marine rated surface mount fuse block accommodates three MRBF fuses for consolidated high amperage circuit protection. The independent source fuse block is ideal for 3 output battery chargers. The clip-on cover insulates terminal connections. Versatile wiring options allow all wires to come out a single side. Label recesses provide easy circuit identification. One-piece stainless flange nuts ensure safe and secure connections. Ignition protected when used with MRBF fuses.


  • Voltage Max: 58VDC. Amperage Max: 300A.
  • Housing & Cover: UL-rated 94V0 Thermoplastic.
  • Ring Terminals: Tin Plated.
  • Terminal Stud Size: M8.
  • Mounting Hole: 3/8".
  • SAE J1171 ignition protected.
  • Fuses sold separately; use with fuse parts 78976 to 78989.
  • Hardware not included.
Item Description Price Qty in
Package 		In Stock Add to Cart
78921 Blue Sea Systems 5194-BSS, MRBF Surface Mount Fuse Block, Independent Source, 5/16"-18 Studs, 240 Amp (1 MIN) 62.09 1 EA ✓

Blue Sea Systems Marine Rated Battery Fuse Blocks - Common Source

Marine Rated Fuse Block

This Blue Sea Systems marine rated surface mount fuse block accommodates three MRBF fuses for consolidated high amperage circuit protection. The common source fuse block provides 3 loads from a single source. The clip-on cover insulates terminal connections. Versatile wiring options allow all wires to come out a single side. Label recesses provide easy circuit identification. One-piece stainless flange nuts ensure safe and secure connections. Ignition protected when used with MRBF fuses.


  • Voltage Max: 58VDC. Amperage Max: 300A.
  • Housing & Cover: UL-rated 94V0 Thermoplastic.
  • Ring Terminals: Tin Plated.
  • Terminal Stud Size: M8.
  • Mounting Hole: 3/8".
  • SAE J1171 ignition protected.
  • Fuses sold separately; use with fuse parts 78976 to 78989.
  • Hardware not included.
Item Description Price Qty in
Package 		In Stock Add to Cart
78922 Blue Sea Systems 5196-BSS, MRBF Surface Mount Fuse Block, Common Source, 5/16"-18 Studs, 240 Amp (1 MIN) 62.09 1 EA ✓
Prop65 Warning