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Blue Sea Systems 5257 MIDI/AMI Fuse 125 Amp Pair

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

5257
06/01/2036 4:47 AM
Sale Price

$7.39

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 5257 is a pair of MIDI/AMI style automotive fuses rated at 125 amps, designed for high-current marine and automotive electrical systems. These compact fuses provide reliable circuit protection in a space-efficient package that fits standard MIDI/AMI fuse blocks and holders.

Key Features:

  • 125 amp rating for high-current circuit protection
  • Sold as a pair for convenience
  • Tin-plated copper terminals provide excellent corrosion resistance in marine environments
  • Clear polycarbonate cover allows visual inspection of fuse element without removal
  • Color-coded for quick amperage identification
  • Compact MIDI/AMI form factor saves panel space
  • Ignition protected to SAE J1171 standards when used with Blue Sea Systems SafetyHub products

Blue Sea Systems fuses are engineered for the harsh marine environment where moisture, vibration, and temperature extremes demand superior reliability. The clear cover design enables at-a-glance status checks, making troubleshooting faster and easier.

Best prices , great service, fast shipping, whats not to like? Will use Autoplicity again and again.

Fast Shipping!

Very Good

Quick service arrived when promised will order from them again

Super easy so far! Assuming everything arrives on time and fits properly I&rsquo;ll definitely be ordering from your site again!

easy

straightforward

Fast

Order #30897. Ordered on Monday, received on Thursday. Exactly what I needed. Can't ask for anything more. Definitely will look at Autoplicity again when I need more parts!

Fast

I pieced a roof rack setup from all over the internet, and Autoplicity consistently beat every other vendor on price and shipping, even most auctions on eBay!<br>I found the site confusing when searching for items directly (why was the "Roof Racks & Cargo Carriers" dropdown empty, when Google showed their ads for tons of these products?). Since they always came up at the top of a Google Shopping search for products, using their website's internal navigation wasn't ever necessary.<br>Customer service guy was a little snippy, but I could have just been interrupting his lunch.

Very Convenient.

quick and easy

I read some of the negative reviews for this site with the BBB and I have to say that I didn't have any of the problems that some had. I got emails to let me know what was going on with my order and followed up to make sure I received it and that it was a

USLP MUCHO BUENO

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