Blue Sea Terminal Fuse, 40 Amp, Green
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
The Blue Sea Terminal Fuse (40 Amp, Green) provides marine-grade DC circuit protection with an ignition-protected design and a clear window for quick visual confirmation of a blown fuse.
Key Features
- 40 Amp terminal fuse for DC main circuit protection
- Interrupt rating satisfies ABYC requirements for DC main circuit protection
- Ignition protected (suitable for gasoline-powered vessels)
- Clear window provides visual indication of a blown condition
- Color coded for amperage
- Designed to be used with a terminal fuse block (not intended to mount directly to the battery terminal)
Intended Use
- Marine DC electrical systems requiring fuse-based circuit protection
- Inverters, windlasses, and bow thruster circuits (when protected at the source)
Product Details
- Brand: Blue Sea Systems
- Product: Terminal Fuse
- Amp Rating: 40 Amp
- Color: Green
- SKU: 661-5176
- Fuse Type: Terminal Fuse (MRBF-style terminal fuse family)
- Indicator: Clear window (visual blown-condition indication)
- Ignition Protection: Ignition protected
- Installation Note: Requires a terminal fuse block; does not mount directly to the battery terminal
Parts Desk Insights
Best Use Case: Use this 40A terminal fuse as the protected element in a properly matched terminal fuse block on a marine DC distribution line where you want both ignition protection and an easy blown-condition visual.
Common Issues: Most installation problems come from incorrect housing—this fuse must be installed in a compatible Blue Sea terminal fuse block rather than mounted directly to the battery terminal. If a circuit won’t stay powered, confirm the fuse block connection and inspect the fuse window for a clear blown indication before troubleshooting downstream equipment.
Related Products & Accessories
- Terminal Fuse Block (compatible with MRBF-style terminal fuses) - This fuse is designed to be used with a terminal fuse block—pair it with the correct compatible fuse block.
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.