Blue Sea Terminal Fuse, 50 Amp, Red
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Blue Sea Systems MRBF Terminal Fuse (50 Amp, Red) provides marine DC circuit protection with an easy-to-check clear inspection window for a visible blown indication.
Key Features
- 50 Amp terminal fuse for marine DC power distribution
- Clear inspection window for visual blown-condition indication
- Ignition protected for installation in gasoline or diesel powered boats
- Color coded for each amperage
- Designed to be used with a compatible terminal fuse block (not mounted directly to the battery terminal)
Intended Use
- Marine DC electrical circuits needing terminal fuse protection
- Primary circuit protection for devices such as inverters, windlasses, and bow thrusters
Product Details
- Product: Blue Sea Terminal Fuse, 50 Amp, Red
- SKU/Part number: 661-5177
- Fuse type: MRBF (Marine Rated Battery Fuse) terminal fuse
- Amperage rating: 50 Amp
Parts Desk Insights
Best Use Case: Use this MRBF terminal fuse as a protected point of circuit protection on marine DC systems, pairing it with the correct Blue Sea terminal fuse block for safe installation and serviceability.
Common Issues: Most common install mistakes are (1) attempting to mount the fuse directly on the battery terminal instead of using the proper terminal fuse block, and (2) mis-matching the fuse amperage/color to the intended protected circuit.
Related Products & Accessories
- Blue Sea terminal fuse blocks (MRBF / compatible fuse holder) - Pair with the correct terminal fuse block for MRBF terminal fuse installation.
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.