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Blue Sea Systems 7721BSS Mega/AMG Safety Fuse Block 30-300A

Manufacturer

Blue Sea Systems

<p>When electrical reliability can mean the difference between a successful voyage and a dangerous situation, marine professionals and enthusiasts turn to Blue Sea Systems. Founded in 1992, this American manufacturer has built a reputation for creating electrical components specifically engineered to withstand the unforgiving marine environment. Every product reflects a commitment to safety standards and real-world performance that has made Blue Sea Systems a leading name in marine and specialty vehicle electrical systems.</p> <h3>Engineering for the Marine Environment</h3> <p>Blue Sea Systems develops and manufactures dependable AC and DC electrical products for marine and specialized vehicle applications, designed in the USA and engineered to excel in challenging environments. The marine environment presents unique challenges—salt spray, constant vibration, temperature extremes, and moisture exposure—that can quickly degrade inferior electrical components. Blue Sea Systems addresses these challenges through careful material selection, rigorous testing protocols, and designs that prioritize both safety and serviceability. Their components are engineered for marine use and align with the intent of ABYC E-11: AC and DC Electrical Systems on Boats and relevant USCG electrical regulations.</p> <h3>Commitment to Safety Standards</h3> <p>Safety standards aren't just guidelines for Blue Sea Systems—they're fundamental to every product design. All Blue Sea Systems marine battery disconnect switches comply with the ABYC C-7 certification, demonstrating their commitment to meeting and exceeding industry safety requirements. The company maintains ABYC-certified employees across multiple departments, from engineering to technical support, ensuring deep expertise in marine electrical system design and installation standards.</p> <h3>Comprehensive Product Range</h3> <p>Blue Sea Systems offers an extensive catalog designed to address every aspect of marine electrical systems. Their <a href="/7262-blue-sea-systems-circuit-breakers-200260">circuit breakers</a> provide resettable overcurrent protection with trip-free designs and clear trip indication for quick diagnostics. For power management, their <a href="/7262-blue-sea-systems-battery-switches-manual-200149">battery switches</a> offer reliable methods for controlling battery banks and disconnecting loads during storage or emergencies, with ABYC C-7 compliance guaranteed.</p> <p>Monitoring system health is critical aboard any vessel, which is why their <a href="/7262-blue-sea-systems-battery-monitors-volt-meters-200146">battery monitors and volt meters</a> provide accurate real-time data to help operators make informed decisions about power usage and charging. The company's <a href="/7262-blue-sea-systems-terminal-blocks-bus-bars-201059">terminal blocks and bus bars</a> create organized, serviceable connection points that simplify installation and future modifications. For keeping batteries properly charged, Blue Sea Systems offers <a href="/7262-blue-sea-systems-battery-chargers-200141">battery chargers</a> engineered with features like automatic charging relay compatibility and proper charge profile management.</p> <h3>Built by Boaters, for Boaters</h3> <p>Blue Sea Systems was founded based on a commitment to create innovative high quality marine electrical products to improve the safety, simplicity, and reliability of boating, with employees who are active boaters applying their passion to designing, developing, and building products. This firsthand experience translates into practical features like modular layouts, standardized footprints, and installer-centric designs that streamline panel work and serviceability. The result is a product line that addresses real challenges faced on the water, backed by comprehensive technical documentation and support resources that help both professionals and DIY enthusiasts complete installations with confidence.</p>

Part Number

7721BSS
06/01/2036 8:11 AM
Sale Price

$32.01

In Stock (10+)

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Usually delivered within 2 days

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Blue Sea Systems 7721BSS Mega/AMG Safety Fuse Block provides reliable overcurrent protection for high-amperage DC circuits on gasoline-powered boats. This ignition-protected fuse block is designed for 30A to 300A circuits and operates at up to 32V DC, making it ideal for demanding marine electrical systems.

Key Features:

  • Ignition protected for safe use on gasoline-powered boats, meeting ABYC and USCG requirements
  • Sealed protective cover shields fuses from moisture, salt spray, and corrosion in harsh marine environments
  • Cover insulation satisfies ABYC/USCG electrical safety standards
  • Flexible wire access with cover breakouts in three directions for easier installation
  • One-piece stainless steel flange nuts ensure secure, corrosion-resistant connections
  • Accepts square format standard or custom labels for clear circuit identification
  • Accommodates wire sizes up to #2/0 AWG (70 mm²) for high-current applications
  • Mounts with 1/4" (M6) screws for secure installation

Specifications:

  • Maximum Operating Voltage: 32V DC
  • Current Range: 30A to 300A
  • Wire Size: #2/0 AWG (70 mm²)
  • Mounting Holes: 1/4" (M6) screws

Note: Mega/AMG fuses are sold separately. This robust fuse block is engineered to Blue Sea Systems' exacting standards for marine electrical safety and reliability.

Products specifications

Amps

30-300

Stud Size

M8

quick and easy so far.

Satisfied thank you.

great thank you

It was fast and helpful

It would be nice to let the customer know that the hub was not included. A list of part number for the hub would be helpful. But overall I was very impressed.

Excellent, I will be placin more orders with this company in the furture.

Quick and easy! Let see how fast is shipping.

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