The Blue Sea Systems 5035 ST Blade Fuse Block is a compact, professional-grade fuse block designed for clean and reliable DC power distribution. With 6 independent fused circuits, it is well-suited for marine, RV, automotive, off-road, and specialty vehicle installations where organized wiring and dependable circuit protection are important.
Key Specifications
- Brand: Blue Sea Systems
- Model: 5035
- Product Type: ST blade fuse block
- Circuit Layout: 6 independent circuits
- Color / Version: With clear cover
- Voltage Rating: 32V DC
- Total Current Rating: 100A
- Per-Circuit Rating: Up to 30A with ATO / ATC blade fuses
- Main Connection: #8-32 positive bus stud
- Material: Plastic body, tin-plated copper conductors
- Mounting Type: Wall mount
- Dimensions: 2.13 × 2.13 × 1.52 inches
- Price: $37.63
- Customer Rating: 4.6/5 from 302 reviews
Design & Build Quality
This fuse block has a sturdy plastic housing with tin-plated copper buses and fuse clips, which helps improve conductivity and corrosion resistance. That is especially important for marine and RV environments where moisture and vibration can shorten the life of lower-quality electrical parts.
The clear insulating cover is a useful feature. It protects the terminals, includes spare fuse storage, and has recessed label areas for circuit identification. The cover also uses a push-button latch, making access easy while still keeping the fuse block protected.
Performance
The 100A total rating and 30A per circuit capacity make this fuse block suitable for many 12V and 24V accessory circuits. It can be used for items such as:
- GPS units
- Chart plotters
- Radar
- Autopilot systems
- Lighting circuits
- Pumps
- Auxiliary electronics
- RV or vehicle accessories
Because the circuits are independent, it is useful when accessories need to remain electrically separate rather than sharing a common fused bus.
Installation
Installation is straightforward for anyone familiar with DC wiring. The #8-32 stud provides a secure main positive feed, while the screw terminals allow clean branch-circuit connections. The included write-on circuit labels help keep the installation organized.
The box includes:
- Fuse block
- Cover
- 20 write-on circuit labels
- 2 terminal block jumpers
Some users may want additional jumpers depending on their wiring layout.
Value for Money
At $37.63, this is more expensive than many basic fuse blocks, but the higher price is justified by the build quality, corrosion resistance, and trusted Blue Sea Systems reputation. For marine or vehicle electrical systems, reliability is worth paying for.
Pros
- 6 independent fused circuits
- 100A total capacity
- Up to 30A per circuit
- Clear protective cover included
- Tin-plated copper for corrosion resistance
- Good for marine, RV, and automotive use
- Includes labels and terminal jumpers
- Compact and organized design
Cons
- More expensive than basic fuse blocks
- Only 2 jumpers included
- No negative bus on this specific version
- Fuses may need to be purchased separately
Final Verdict
The Blue Sea Systems 5035 ST Blade Fuse Block is a high-quality, reliable fuse block for organized DC power distribution. Its 6 independent circuits, corrosion-resistant construction, protective cover, and compact design make it an excellent choice for boats, RVs, vehicles, and equipment where clean wiring and dependable circuit protection matter.
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