


🛠️ Fuse your circuits with confidence—compact power, marine tough!
The Blue Sea Systems 5191 Fuse Block Terminal is a compact, marine-grade DC fuse block designed for high-capacity circuit protection up to 58V and 300A. Its weatherproof, corrosion-resistant build and insulating cap make it ideal for boats, RVs, and harsh environments, providing reliable, easy-to-install overcurrent protection with universal fit compatibility.







| ASIN | B0019ZBTV4 |
| Batteries | 1 Unknown batteries required. |
| Best Sellers Rank | #10,393 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2 in Fuse Blocks (Tools & Home Improvement) |
| Brand | Blue Sea Systems |
| Color | Single Fuse |
| Connector Type | Screw |
| Current Rating | 300 Amps |
| Date First Available | October 1, 2001 |
| Department | Unisex-Adult |
| Gauge | 1.0 |
| Global Trade Identification Number | 00632085051914 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1.6 ounces |
| Item model number | 5191 |
| Manufacturer | Blue Sea Systems |
| Material | Plastic |
| Mounting Type | hole mount |
| Number Of Contacts | 1 |
| Number Of Poles | 1 |
| Product Dimensions | 2.5"W x 2"H |
| Specification Met | Sea |
| UPC | 632085051914 |
| Voltage | 58 Volts |
M**N
Good design and well made
This compact, well-made design worked perfectly in my fifth-wheel RV. I made the switch from lead acid to LiFePO4 battery power with solar charging. I needed a compact device to provide a primary fused circuit breaker right at my 300 Sh battery. This does the job of providing protection at a reasonable cost.
H**L
Buy once. Buy right. Buy this one.
High quality, easy to install. It's all about the fuse now to see if this works. Hopefully it never trips.
J**.
Genuine Eaton part.
Why did you pick this product vs others?: It's the highest rated seller for this product. Genuine Eaton part. Photos show it having fuses but it does not come with fuses. Safety: These should be standard on all electric carts and scooters. These should also be standard on anything with long runs of battery cable.
T**S
Blue sea fuse blocks
I bought 2 of these and as I thought, they are very well made and I'm sure will work for me very well.
M**T
High quality!
Using this to fuse a 4 gauge OFC wire directly at my cars battery. It's going to the alternator positive for part of "the big 3" upgrade. I'd say this is the best method for fusing the positive wire on the big 3. Most people leave their positive wire unfused for the big 3. I felt an inline fuse wasn't the best solution for such a short run and still having 6-8in of unfused wire. I'd like to even replace the inline fuse with one of these going to my audio system.
J**N
Solid, compact and perfect for my needs!
Where have these been my whole life? This dual terminal fuse block is built like a rock, compact, and greatly simplifies wiring versus ANL or Mega fuses. Obviously the others have there place, but for my 12v build, these are perfect.
R**R
Can't get a fuse much closer to the battery than this
I used these on the positive terminals of two parallel 24 Volt strings in my battery bank. The fuses are not cheap, but based on my loads (and their fuses), these should only open in situations where the price of a fuse would be the least of my worries. I like that the terminal mounting protects from a short in all situations other than an uninsulated tool somehow finding its way into my battery box and then falling in such a perfect way as to contact the small exposed area of multiple terminals. The rubber insulator cap over the connection on the fuse end is a great feature but I do wish there was a rubber cap that concealed the terminal end of the fuse block. The added height of about 2-1/16" is minor and worked well for me, but is something to be aware of to ensure you do not have a conflict, in my case the total height above the battery case with the rubber cap seated was about 2-1/4" (possibly slightly more as it was a difficult location to accurately read the tape). I appreciate the protection from a short in a parallel battery or contact with one of the cables leading to the main fuse block. It may be overkill, but for me the large discharge potential of each string in the battery bank justifies the caution. The ignition protection of the Blue Sea Systems MRBF fuses was an added bonus that makes these acceptable for a variety of installations.
D**E
Exactly as described. Very courteous. Highly recommended seller.
Exactly as described. Very courteous. Highly recommended seller.
M**T
Very neat system for mounting fuse directly to battery terminal. Changed battery lugs to cargo type so that fuse block would be mounted vertically.
P**1
Sehr gutes Produkt, ermöglicht eine schlanke Elektroinstallation mit dem Nachteil, daß die Sicherungen ihren Preis haben. Für mich aber trotzdem angenehmer, als eine extra MEGAfuse-Box plus Kabel einzubauen.
A**R
Well made, easy to fit
A**O
Articoli arrivati rotti, non nella confezione originale, senza il minimo imballaggio. Il venditore mi ha proposto il rimborso di uno solo dei due, che però non è mai arrivato. Ho contattato Amazon che ha provveduto a rimborsarmeli entrambi.
N**.
Très compact, plus sécuritaire que les fusibles "inline" ou de type ANL , vous ne vous trompez pas côté qualité... n'oubliez pas de commander aussi les fusibles, elles ne sont pas incluses ...
Trustpilot
3 days ago
1 week ago