SKU: 71525423594

Blue Sea 12 Circuits Blade Fuse Block/Holder w/ Negative Bus & Cover

Sale price$87.30 Regular price$97.00
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Description

Blue Sea 12 Circuits Blade Fuse Block/Holder w/ Negative Bus & CoverBlue Sea Systems ST Blade Fuse Block: Centralised Power Distribution for Marine and RV Systems Streamline Your 12V and 24V Electrical Systems The Blue Sea Systems ST Blade Fuse Block (12 Circuits) is the industry standard for consolidating branch circuits in demanding mobile environments. Designed to eliminate the "rats' nest" of in line fuses and messy wiring often found in boats, caravans, and 4WD canopies, this distribution block offers a

Blue Sea Systems ST Blade Fuse Block: Centralised Power Distribution for Marine and RV Systems

Streamline Your 12V and 24V Electrical Systems

The Blue Sea Systems ST Blade Fuse Block (12 Circuits) is the industry standard for consolidating branch circuits in demanding mobile environments. Designed to eliminate the "rats' nest" of in-line fuses and messy wiring often found in boats, caravans, and 4WD canopies, this distribution block offers a professional, safe, and reliable solution for managing your DC electrical connections.

Engineered for 12V and 24V systems (rated up to 32V DC), this unit allows you to power up to 12 separate accessories—such as fridges, lighting, water pumps, and navigation electronics—from a single reliable source. With a maximum total amperage of 100A per block and 30A per circuit, it is robust enough to handle the power requirements of modern off-grid setups while ensuring specific circuits are protected against overcurrent faults.

Integrated Negative Bus for Simplified Wiring

One of the standout features of this model is the integrated negative bus. In many electrical installations, finding a clean and accessible location for return lines (grounding) can be a challenge, often leading to stacked terminals on battery posts. This fuse block includes a built-in negative bus with #10-32 (Approx. M5) stud terminals, allowing you to run both positive and negative wires to the same block.

This design not only saves significant installation time but also reduces the number of connections required, minimising voltage drop and potential failure points. It creates a compact, self-contained power hub that makes troubleshooting easier in the future.

Marine-Grade Durability and ABYC Compliance

Built to withstand harsh saltwater and outdoor environments, the unit features tin-plated copper buses and fuse clips. This plating provides superior corrosion resistance compared to bare copper, ensuring consistent conductivity over the life of the vessel or vehicle. The base is constructed from reinforced polycarbonate, offering excellent heat resistance and strength.

The included insulating cover is designed to satisfy ABYC and USCG requirements for electrical insulation, protecting the fuses from accidental short circuits. The cover features an easy-to-open push-button latch, storage space for two spare fuses, and label recesses that accept Blue Sea Systems' Small Format Labels (sold separately), ensuring your system is clearly identified and compliant.

Key Features

  • 12 Independent Circuits: consolidate varying loads into one central hub
  • Integrated Negative Bus: simplifies wiring by providing a central ground point
  • High Current Rating: Supports 100A total continuous current and 30A per circuit
  • Corrosion Resistant: Tin-plated copper components for marine longevity
  • Safety Cover Included: Meets insulation requirements and stores spare fuses
  • Wide Voltage Range: Suitable for 12V and 24V DC systems (Max 32V DC)

Installation and Technical Context

This fuse block is designed for versatility. It accepts standard ATO® and ATC® fast-acting blade fuses, which are widely available and easy to replace. The main positive distribution bus utilises a #10-32 (Approx. M5) stud, while the branch circuits use #8-32 (Approx. M4) screws with captive star lock washers to ensure secure connections even under vibration.

*Note: While rated for 100A maximum, typical de-rating factors apply based on ambient temperature and wire sizing. Ensure your supply cable is fused appropriately at the battery source.

Whether you are refitting a yacht or building a custom 12V system for a camper trailer, the Blue Sea Systems 5026 fuse block delivers the reliability and organization required for professional-grade electrical installations.

Secure Your Electrical System

Upgrade to the Blue Sea Systems 12 Circuit ST Blade Fuse Block today for a safer, cleaner, and more reliable power distribution system in your boat or vehicle.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 71525423594

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S
Shredder
Phoenix, US
★★★★★ 5
Lightweight, Comfortable Hoodie That’s Great for Everyday Wear
Color: Grey Green, Size: XX-Large
This hoodie turned out to be a really solid combination of comfort, performance, and casual style. The fabric feels lightweight and breathable while still providing enough warmth for cooler mornings and evenings. I especially like how soft and stretchy it feels without being bulky. The moisture-wicking, quick-drying material works well for workouts and outdoor activities, and it also looks clean enough for everyday casual wear. I’ve worn it to the gym, while traveling, and just around the house, and it’s been comfortable in every situation. The subtly textured design gives it a more premium appearance than a standard hoodie, and the fit strikes a nice balance between relaxed and athletic. It layers easily with jackets or can be worn on its own with joggers or jeans. Another big plus is the UPF protection, which makes it useful for outdoor activities like hiking, golf, or walking around in the sun. Overall, this is a versatile, comfortable, and stylish hoodie that works great for both active and casual use. Highly recommended!
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Reviewed in the United States on May 20, 2026
T
Timothy Ward
Los Angeles, US
★★★★★ 5
A great lightweight hoodie.
Color: Light Dark Blue Grid, Size: X-Large
Another excellent M MAELREG product. I already have some pants and jackets from M MAELREG and figured this hoodie would be great as well and I was right. It is lightweight and very comfortable while also being warm. The material is smooth and soft to the touch with a stylish look to it that would work in tthe gym, on the golf course, or out about town. I really love the hood design, not having a single hem down the center lets the hood rest more naturally on your head. It fits as expected, I would prefer it to be a couple inches longer, but that's just my personal taste. Overall, this is an excellent lightweight hoodie.
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Reviewed in the United States on May 18, 2026
R
Robbel
Lowell, US
★★★★★ 5
Nice hoodie, very comfortable
Color: Misty Blue, Size: Medium
This hoodie feels lightweight and breathable which makes it good for golf, workouts, or just casual everyday wear. The fabric has a soft athletic feel and stretches enough to stay comfortable while moving around. It’s lighter than a standard sweatshirt, so it works better for layering or mild weather. I liked that it didn’t feel bulky while still giving some warmth during cooler mornings. The hood lays nicely and the material dries fairly quickly if you sweat in it. It also has a cleaner athletic look that pairs well with joggers, shorts, or golf pants without looking sloppy. One thing to note is it’s thinner than some people may expect from a hoodie, so it won’t replace a heavy sweatshirt in colder weather. The fit also runs slightly slim depending on build. Still, for sports, travel, or casual wear, it’s comfortable and easy to throw on without feeling heavy.
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Reviewed in the United States on May 11, 2026
H
hannah
Lexington, US
★★★★★ 4
Great lightweight fabric, good design
Color: Grey Green, Size: Small, Color: Grey Green, Size: Small
This hoodie is a great athletic top. The size small fits my husband well, although it's a little loose in the arms. So if you have a leaner figure, you may find it a bit baggy. But the fabric is fantastic, a high-quality performance fabric that seems breathable and the UV protection is a great bonus. The sleeves are long enough to make good use of the thumb holes in cooler weather, and the color is a nice neutral, gray-green. For reference, the size small has a chest of about 42" (measured just under the sleeves) and a center back length of approx. 25".
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Reviewed in the United States on April 5, 2026
N
NorNev Reviews
Belleville, US
★★★★★ 5
Great Quality and Look
Color: Grey Green, Size: Medium
21st century materials are here to save us! :) M Maelreg does a great job utilizing those materials to the best of their ability. I've really become a fan of just about anything that they make, and this shirt is no exception. It's made from the very popular 88/12 Poly/spandex blend that has become ubiquitous in the fitness/active industry because of its amazing tensile characteristics- wicking, quick dry, UPF, and extra comfy against the skin. You get all of that here and a no-frills, really beautiful color to go along with a fit that is exactly true to size. I took the more form-fitting version for my 5'10" 175 lb. frame (I've found both L and M work from these guys, M for a more tailored look) and it's exactly right- enough room to move around comfortably and breathe, not so tight that it's hugging my belly. It's super lightweight and really easy to launder (I hang dry mine to prevent pilling and wrinkles), cold/low and a medium/low heat iron to rid those stubborn factory wrinkles and you shouldn't ever need to iron it again. Another great offering from the folks at Maelreg.
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Reviewed in the United States on April 15, 2026

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