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Blue Sea Systems 5056100 ST Blade Water-Resistant Fuse Block with Manual Cover

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

5056100
06/01/2036 4:02 PM
Sale Price

$35.23

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 5056100 is a compact, water-resistant ST-Blade fuse block designed to provide reliable circuit protection for marine, RV, and powersports electrical systems. This 4-circuit fuse block accepts standard ATO/ATC fast-acting blade fuses and features a manual cover with convenient wing screws for tool-free access, meeting ABYC compliance standards.

Key Features:

  • Water-resistant construction protects against moisture and corrosion in harsh environments
  • Accepts ATO and ATC fast-acting blade fuses plus ATO/ATC-style low-profile circuit breakers
  • Tool-free wing screw design allows quick access to fuses without tools
  • Tin-plated copper bus bars and fuse clips ensure excellent conductivity and corrosion resistance
  • Accommodates input wire from 4 AWG to 8 AWG and load wires from 10 AWG to 16 AWG
  • Standard ring or spade-type terminals for simple wiring with common tools
  • Includes 3 wire plugs to maintain water-resistant rating when using fewer than 4 circuits
  • Nests with other Blue Sea ST-Blade fuse blocks and 100A busbars for organized installations
  • Integrated spare fuse and fastener storage in cover
  • Four write-on circuit labels included for easy identification

Technical Specifications:

  • Maximum voltage: 32V DC
  • Number of circuits: 4
  • Bus bar material: Tin-plated copper
  • Mounting: 1/4 inch (6mm) screw holes
  • Terminal screws: Four #8-32 with captive star lock washers
  • Meets ABYC/USCG insulation requirements

Package Includes:

  • 5056100 fuse block with cover
  • Four write-on circuit labels
  • Three wire plugs
  • Instruction manual

This fuse block provides professional-grade circuit protection in a compact footprint, ideal for upgrading or organizing electrical systems in boats, RVs, and other 12V/24V DC applications.

Let&rsquo;s see if you get it to us as promised within a couple of days and then I&rsquo;ll be SUPER happy:

great job fast service

Best prices anywhere. Couldn't believe how fast it arrived!

Simple, quick and easy to understand check out process.

so far so good

Thumbs up

Arrived on time and as advertised

So far, quick and easy.

you had the part I needed for a decent price, my only issue is with the shipping prices.

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