Blue Sea Terminal Fuse, 90 Amp, Purple
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Protect DC main circuits with a Blue Sea Systems MRBF (Marine Rated Battery Fuse) terminal fuse designed for reliable interruption and easy visual diagnostics. The 90A, purple color option helps identify amperage while the clear window shows a blown condition.
Key Features
- High interrupt rating designed to satisfy ABYC requirements for DC main circuit protection
- Ignition protected for marine installations
- Clear window provides a visual indication of blown condition
- Color coded for quick amperage identification (purple for 90A)
- Terminal fuse style—requires a compatible terminal fuse block (not intended to mount directly to the battery terminal)
Intended Use
- Marine DC main circuit protection
- Inverter protection circuits
- Windlass protection circuits
- Bow thruster protection circuits
Product Details
- Brand/Series: Blue Sea Systems MRBF (Marine Rated Battery Fuse)
- Fuse Amperage: 90 Amp
- Color: Purple
- Catalog/SKU: 661-5182
- Fuse Type: Terminal fuse (MRBF)
- Visual indicator: Clear window to show blown condition
- Ignition protection: Built-in (ignition protected)
Parts Desk Insights
Best Use Case: Use this MRBF terminal fuse as the upstream protection for DC equipment such as inverters, windlasses, and bow thrusters—especially where ABYC-style DC main circuit protection and a clear visual blown indication are desired.
Common Issues: If the fuse keeps blowing, confirm you’re using the correct fuse block/fuse holder for the MRBF terminal fuse and verify the circuit load and wiring connections. Also ensure the fuse is installed in the proper location so the ignition-protected design and required mating hardware are correctly used (MRBF terminal fuses require a terminal fuse block rather than direct battery terminal mounting).
Related Products & Accessories
Browse related Breakers, Fuses & Fuse Holders to complete the 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.