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Blue Sea Systems 5502100 Class T Fuse Block with Insulating Cover 225-400A

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

5502100
06/20/2036 11:34 PM
Sale Price

$94.70

In Stock (10+)

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

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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 5502100 Class T Fuse Block provides fast-acting circuit protection for high-amperage applications including inverters, battery banks, and other marine electronics. This professional-grade fuse block accommodates Class T fuses rated from 225 to 400 amperes and features a protective insulating cover that meets ABYC and USCG safety requirements.

Key Features:

  • Four-stud design provides generous clearance around connection points for easy installation of large cable lugs without interference from the fuse
  • Insulating cover with breakout slots allows wire access from multiple directions while maintaining required electrical insulation
  • Stainless steel terminal studs resist corrosion in harsh marine environments and maintain secure connections under high heat conditions
  • Tin-plated copper fuse mounting blocks ensure excellent conductivity and reliable performance
  • One-piece stainless steel flange nuts provide safe, vibration-resistant connections
  • UL 94-V0 rated base material resists high temperatures and flame spread
  • Ignition protected for safe installation in gasoline engine compartments

Technical Specifications:

  • Amperage Range: 225-400A (maximum rated load: 320A)
  • Voltage Rating: 160V DC maximum
  • Cable Capacity: Up to 4/0 AWG
  • Terminal Stud Size: 5/16"-18 (M8)
  • Fuse Type: Class T
  • Ignition Protection: Yes
  • Materials: Tin-plated copper blocks, stainless steel studs and hardware, UL 94-V0 base

This fuse block is ideal for protecting high-current DC circuits in marine, RV, and off-grid power systems where reliable overcurrent protection is critical.

Products specifications

Amperage

225 Amps - 400 Amps

Mounting Hardware

Four 1/4" (M6) Screws (Sold Separately)

Type

Fuse Blocks

ISO Approved

ISO 8846SAE J1171

Warranty Details

Lifetime

Fast, parts in stock and you can pay with amazon.

Had what I needed at a good price. Finish was easy.

So far sooo good. I'll tell you more when the product arrives!

Great price and looking forward receiving the merchandise. Thanks you!`

Best Prices

Quick shipping when it shipped out. Just as described and a great battery. Would buy from again.

Autoplicity was easy to deal with, and the price was hard to beat. Will use again.

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