Blue Sea Systems AMG® Safety Fuse Block
SKU BLUE-7721
- Maximum Amperage
- 300A
- Maximum Voltage
- 32V DC
- Stud Size
- M8 x 1.25
- Recommended Stud Torque
- 120 in-lb (13.56 N·m)
- Ring Terminal Size
- M8 (5/16")
- Weight
- 0.15lb (0.07 kg)
- Voltage
- 32V DC
- Function
- Safety Fuse Blocks
Stocked items typically ship the next business day from our US warehouse. 30-day returns on unused stocked items. Exclusions apply. Return policy · Shipping policy
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About this product
AMG® Safety Fuse Block. Ignition protected for installation aboard gasoline or diesel powered boats. Sealed cover protects fuses from the harsh marine environment.
Key features
- 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
- 300A maximum with 4/0 cable
- Accepts Blue Sea Systems Square Format standard or custom label
- Fuses sold separately
For installation planning, check the manufacturer's ratings: maximum amperage: 300A; maximum voltage: 32V DC.
Manufacturer part 7721. Confirm the circuit rating, mounting arrangement, and required accessories against the manufacturer specifications before selecting this part.
Manufacturer specifications
- Maximum Amperage
- 300A
- Maximum Voltage
- 32V DC
- Stud Size
- M8 x 1.25
- Recommended Stud Torque
- 120 in-lb (13.56 N·m)
- Ring Terminal Size
- M8 (5/16")
- Weight
- 0.15lb (0.07 kg)
Product details
- Voltage
- 32V DC
- Function
- Safety Fuse Blocks
- Device Type
- Safety Fuse Blocks
- Manufacturer
- Blue Sea Systems
- Product Type
- Safety Fuse Blocks
Shipping & returns
- Stocked items typically ship the next business day from our US warehouse.
- 30-day returns on unused stocked items. Exclusions apply. See policy
- Custom and quoted items are non-returnable once production begins.
Warranty
Backed by the original manufacturer’s warranty plus our workmanship guarantee on assembled harnesses. Contact us with your invoice and we’ll coordinate any covered repair or replacement.
Read the full warranty termsTechnical support
Need help choosing the right part?
Our marine electrical team can review your setup and recommend compatible products. Send a photo, a sketch, or your circuit list and we'll come back with a parts list that fits the boat.
Certifications & training
- ABYC-aware build practices
- OEM-grade marine wire & terminals
Additional capabilities are based on hands-on experience building marine wiring systems rather than third-party certification.
Share your project
Have you used this product in a project? Send us photos of your install for consideration in our project gallery.
Why buy from Common Ground Marine
- 20+ years building marine wiring harnesses, panels, and shore-power systems.
- Engineers — not a phone tree — review every custom build before parts are cut.
- OEM-grade components: tinned copper, sealed connectors, marine-rated jackets.