Blue Sea Systems ST Blade Fuse Block – 6 Circuit with Indicator (5037)
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Blue Sea Systems ST Blade Fuse Block – 6 Circuit with Indicator
Keep your boat's electrical system organized, protected, and easy to diagnose. The Blue Sea Systems 5037 ST Blade Fuse Block delivers six independently fused circuits in a compact, marine-grade housing — purpose-built for the demanding environment of a boat's electrical panel. Each circuit is individually protected, and the built-in LED indicator lights up the moment a fuse blows, so you can pinpoint a fault instantly without pulling every fuse in the block.
Whether you're wiring navigation lights, bilge pumps, electronics, or accessories, this fuse block gives you a clean, professional installation that holds up to vibration, moisture, and the daily rigors of on-water use.
Key Features
- 6 independent ST Blade fuse circuits — accepts standard ATC/ATO blade fuses
- Built-in LED blown-fuse indicator per circuit for fast fault diagnosis
- Accepts 15A maximum per circuit
- Ignition-protected and rated for marine environments
- Tin-plated copper bus bar for corrosion resistance
- Transparent cover included to protect fuses from moisture and debris
- Compact footprint — easy to mount in tight panel spaces
- Accepts 16–10 AWG wire per circuit
Compatible Applications
- Marine electrical panels and accessory circuits
- Navigation lights, bilge pumps, and blowers
- VHF radios, chartplotters, and electronics
- Cabin lighting and 12V accessory circuits
- Trailer wiring and auxiliary power distribution
Specifications
- Part Number: 5037
- Circuits: 6
- Fuse Type: ST Blade (ATC/ATO)
- Max Current per Circuit: 15A
- Wire Range: 16–10 AWG
- Indicator: LED blown-fuse indicator
- Cover: Included
Parts Desk Insights
This fuse block is best suited for boats adding or reorganizing accessory circuits — particularly when you need a clean, labeled distribution point for multiple low-to-medium current loads. It's a go-to choice for new electronics installations, lighting upgrades, or replacing aging fuse panels. The LED indicator is a standout feature for troubleshooting: when a fuse blows underway, you'll know exactly which circuit failed without guesswork.
Pair it with the Inline Fuseholder AT0/ATC-30A for higher-current branch protection, or explore our full range of Blue Sea Systems 5023 ST-Blade Battery Terminal Mount Fuse Block, ST Blade Compact Fuse Block – 4 Circuit, and ST Blade Compact Fuse Block – 8 Circuit to match your panel layout.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.