Blue Sea Terminal Fuse, 100 Amp, Yellow
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Blue Sea Terminal Fuse, 100 Amp (Yellow) provides marine-rated DC main circuit protection with an ignition-protected design, plus a clear window to show a blown condition at a glance.
Key Features
- 100 Amp terminal fuse with yellow color for easy amperage identification
- Ignition protected—designed for safe installation aboard gasoline powered boats
- Clear window for visual confirmation of a blown fuse condition
- High interrupt rating satisfies ABYC requirements for DC main circuit protection on large battery banks
- Designed to be used with a terminal fuse block (requires a fuse block rather than direct mounting to the battery terminal)
- Suitable for protecting common marine power loads such as inverters, windlasses, and bow thrusters
Intended Use
- Marine DC main circuit protection
- Battery bank circuit protection for marine electrical systems
- Inverter power circuit protection (marine use)
- Windlass power circuit protection
- Bow thruster power circuit protection
Product Details
- • Brand / system: Blue Sea Systems (tagged as Blue Sea Systems)
- • Product: Terminal Fuse (MRBF Terminal Fuse)
- • Amperage: 100 Amp
- • Color: Yellow
- • Part/SKU: 661-5183
- • Clear window: Visual indication of blown condition
- • Ignition protection: Ignition protected
- • Rating/standard reference: High interrupt rating satisfies ABYC requirements for DC main circuit protection on large battery banks
- • Installation note from product data: Requires a terminal fuse block; do not mount directly to the battery terminal
Parts Desk Insights
Best Use Case: Use this 100A MRBF terminal fuse as upstream protection on large battery bank DC circuits where ignition-protected components and quick visual status are important—especially for inverter, windlass, or bow-thruster power wiring.
Common Issues: Most common installation mistakes are (1) trying to mount directly to the battery terminal instead of using the proper terminal fuse block, and (2) not using the correct amperage/color-coded fuse for the protected load.
Related Products & Accessories
- Terminal Fuse Blocks (for MRBF/terminal fuse use) - Browse the Blue Sea terminal fuse block options to match this MRBF fuse.
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.