The MEGA®/AMG® Safety Fuse Block uses readily available MEGA®/AMG® fuses.

This fuse type is popular with boaters because it is an economical way to achieve circuit protection up to 300A.

With a 2000A interrupting capacity, these fuses are suitable for branch circuit protection, or main circuit protection with smaller battery banks.

Both Safety Fuse Blocks carry on the important features of the SafetyHub family. Ignition protection is the core feature of these products.

Using ignition protected devices where required is essential for safety and regulatory compliance, and the SafetyHubs and Safety Fuse Blocks are ignition protected to SAE J1171 and ISO 8846.

They are safe for use in engine compartments and other locations on gasoline or diesel vessels where a potential fuel source may be present.

  • Ignition protected for installation aboard gasoline or diesel powered boats
  • Sealed cover protects fuses from the harsh marine environment
  • Insulating cover satisfies ABYC/USCG insulation requirements
  • Cover breakouts allow wire access in any direction
  • 200A maximum with 4/0 cable
  • Accepts Blue Sea Systems Square Format standard or custom label
  • Fuses sold separately
Maximum Amperage 200A
Maximum Voltage 32V DC
Stud Size M8 x 1.25
Fuse Screw M5 x 0.8
Recommended Screw Torque 27 in-lb (3.05 N·m)
Recommended Stud Torque 120 in-lb (13.56 N·m)
Ring Terminal Size M8 (5/16")
Weight 0.15lb (0.07 kg)


Barcode # 7721B-BSS
Brand Blue Sea Systems
Shipping Weight 0.2200kg
Shipping Width 0.200m
Shipping Height 0.045m
Shipping Length 0.100m
Shipping Cubic 0.000900000m3

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