Sierra FS84230 Marine Rated Battery Fuse, 300A, Grey
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Sierra FS84230 is a marine rated battery fuse terminal designed to mount directly on the positive battery stud, providing DC main-style circuit protection and fault indication in compact installations.
Key Features
- Ignition protected when used with Sierra MRBF Fuses
- Bolt-down design for high-vibration applications
- Standard isolated M8 stud design allows stacking of terminals
- Protective, insulating cap helps prevent accidental shorts
- Compact design supports high-current protection in tight spaces
- Designed for DC Main, Bow Thruster, Inverter, and windlass circuit protection
- 300A maximum amperage
- Meets ABYC requirements for DC main circuit protection on large battery banks with high-interrupt rating
- Easy fault indication with clear fuse display
- Color-coded amperage identifier
Intended Use
- DC main battery circuit protection (large battery bank applications)
- Bow thruster circuit protection
- Inverter circuit protection
- Windlass circuit protection
- General marine DC high-current battery protection where MRBF-style fuse terminals are used
Product Details
- Product title: Sierra FS84230 Marine Rated Battery Fuse, 300A, Grey
- Fuse/terminal maximum amperage: 300A
- Color: Grey
- Stud type: Standard isolated M8 stud (supports stacking of terminals)
- Mounting: Bolt-down design
- Design intent: Positive battery stud circuit protection from the power source
- SKU/variant identifier: 11-FS84230
- Variant barcode value is not included because it is provided in scientific notation (unrendered in customer-facing details).
Parts Desk Insights
Best Use Case: Ideal for battery positive stud installations where you want compact, bolt-down, high-vibration-ready DC circuit protection with visible fault indication.
Common Issues: If the fuse doesn’t seat or the assembly doesn’t sit correctly, double-check that you’re using the intended MRBF fuse format and that terminals are stacked properly on the isolated M8 stud; also confirm the protective insulating cap is in place to reduce the risk of accidental shorts.
Related Products & Accessories
- Fuses - Browse the fuse category for matching MRBF fuse elements and related protection components.
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.