Battery Terminal Single Fuse Block, 30-300 Amps
No restocking fees on eligible returns
You have 30 days to request a return. All sale items are final sale.
Customer pays return postage. Return postage is reimbursed if we made a mistake.
The Blue Sea Systems 5191 is a compact single MRBF terminal fuse holder for high-current DC circuit protection at the battery connection. An isolated stud and insulating cap keep the fused connection organized and protected.
Key Features
- Part number: 5191
- MRBF fuse range: 30–300A
- Maximum rating: 300A, 58V DC
- Accepts 5/16 in. ring terminals; mounts on 3/8 in. terminal studs
- Product weight: 0.16 lb (0.07 kg)
- Fuse sold separately
Installation Notes
Disconnect battery power before installation. Select the fuse for the cable and connected load, confirm terminal fit, and follow the manufacturer’s wiring and tightening instructions. Replace a damaged or heat-discoloured holder before returning the circuit to service.
Manufacturer product information · Manufacturer mounting diagram
Shipping information
In-stock and OEM parts: ship same or next business day.
Supplier-stock items are usually ready for pickup or shipping within 24 hours of ordering.
Special-order timing may vary.
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.