Additional Information
Features
The Blue Sea Systems MEGA / AMG Safety Fuse Block is ignition protected for installation aboard gasoline or diesel powered boats. A sealed insulating cover protects fuses from the harsh marine environment and satisfies ABYC/USCG insulation requirements. Cover breakouts allow wire access in any direction. Does not include fuses. Meets CE, IP66, ISO 8846, and SAE J1171 marine regulatory specs.
• Maximum Amperage: 300A
• Maximum Voltage: 32V DC
• Cable Size: 4/0 AWG
• Recommended Stud Torque: 120 in.-lb. (13.56 Nm)
• Terminal Screw: 5/16" (M8)
• Terminal Stud Size: 5/16" (M8)
• Overall: 4.92"L x 1.51"W
Blue Sea Systems No. 7721
Show moreShow less
• Maximum Amperage: 300A
• Maximum Voltage: 32V DC
• Cable Size: 4/0 AWG
• Recommended Stud Torque: 120 in.-lb. (13.56 Nm)
• Terminal Screw: 5/16" (M8)
• Terminal Stud Size: 5/16" (M8)
• Overall: 4.92"L x 1.51"W
Blue Sea Systems No. 7721
- Ignition protected
- Sealed insulating cover
- Cover breakouts for wire access in any direction
- 300A maximum
Specs
Unit Weight | 0.50 lb |
---|---|
Brand | Blue Sea Systems |

WARNING: Cancer and Reproductive Harm
For more information, go to www.P65Warnings.ca.gov/product.
Reviews
Q & A
The Blue Sea Systems MEGA / AMG Safety Fuse Block is ignition protected for installation aboard gasoline or diesel powered boats. A sealed insulating cover protects fuses from the harsh marine environment and satisfies ABYC/USCG insulation requirements. Cover breakouts allow wire access in any direction. Does not include fuses. Meets CE, IP66, ISO 8846, and SAE J1171 marine regulatory specs.
• Maximum Amperage: 300A
• Maximum Voltage: 32V DC
• Cable Size: 4/0 AWG
• Recommended Stud Torque: 120 in.-lb. (13.56 Nm)
• Terminal Screw: 5/16" (M8)
• Terminal Stud Size: 5/16" (M8)
• Overall: 4.92"L x 1.51"W
Blue Sea Systems No. 7721
Show moreShow less
• Maximum Amperage: 300A
• Maximum Voltage: 32V DC
• Cable Size: 4/0 AWG
• Recommended Stud Torque: 120 in.-lb. (13.56 Nm)
• Terminal Screw: 5/16" (M8)
• Terminal Stud Size: 5/16" (M8)
• Overall: 4.92"L x 1.51"W
Blue Sea Systems No. 7721
- Ignition protected
- Sealed insulating cover
- Cover breakouts for wire access in any direction
- 300A maximum
Unit Weight | 0.50 lb |
---|---|
Brand | Blue Sea Systems |

WARNING: Cancer and Reproductive Harm
For more information, go to www.P65Warnings.ca.gov/product.