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Blue Sea Systems 5191 Fuse Block Terminal 30-300 AMP
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Return this item for free
Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns.- Go to your orders and start the return
- Select the return method
- Ship it!
Purchase options and add-ons
Current Rating | 30 Amps, 300 Amps |
Gauge | 1.0 |
Connector Type | Screw |
Number Of Contacts | 1 |
Material | Plastic |
Color | Single Fuse |
Brand | Blue Sea Systems |
Voltage | 58 Volts |
Product Dimensions | 2.5"W x 2"H |
Number of Positions | 1 |
About this item
- Voltage Max Operating: 58V DC, Amps Max Operating: 300A per block, Terminal Fuses Avail.: 30A-300A, Terminal Stud Size: 5/16"-18 (8mm), Mounting Hole Size: #10 (5mm)3/8"
- Compact, high-amp fuse—appropriate for DC Main, inverter, windlass, and bow thruster circuit protection
- Weatherproof – suitable for small open-cockpit boats and other harsh environments
- Insulating cap prevents accidental shorts
- Ignition protected when used with MRBF fuses
- Fuses sold separately
- Fit type: Universal Fit
Frequently bought together
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Product details
- Is Discontinued By Manufacturer : No
- Product Dimensions : 6.3 x 2.5 x 2 inches; 2.88 ounces
- Item model number : 5191
- Department : Unisex-Adult
- Batteries : 1 Unknown batteries required.
- Date First Available : October 1, 2001
- Manufacturer : Blue Sea Systems
- ASIN : B0019ZBTV4
- Country of Origin : USA
- Best Sellers Rank: #12,006 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement)
- Customer Reviews:
Product Description
Fuse Block, Battery Post Mount, 1 stud, MFG# 5191, Accepts MRBF fuses from 30-300 Amp. Mounts on 3/8" (MN10) Battery Post, single 5/16" stud for wire connections. Fuse not included.
Important information
Legal Disclaimer
Warning: Product may contain materials cautioned by California Proposition 65
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From the manufacturer
Blue Sea Systems MRBF Terminal Mount Fuse Blocks
Marine-grade, ignition-protected fuse blocks accommodate high amperage MRBF fuses. Suitable for protecting DC main, inverter, windlass, and bow thruster circuits. Mounts on a 3/8" battery post, battery switch or busbar, allowing for easy installation in tight space constraints and satisfies ABYC 7" circuit protection rule. Includes insulating cap to prevent accidental shorts.
Blue Sea Systems MRBF Surface Mount Fuse Blocks
Surface mount fuse blocks accommodate three MRBF fuses for consolidated high amperage circuit protection. Utilizes marine-grade stainless steel and UV-stabilized plastics, and are ignition protected. The independent source fuse block (part number 5194) is ideal for 3 output battery chargers. The common source fuse block (part number 5196) provides 3 loads from a single source. Clip-on cover insulates terminal connections and includes label recesses for easy circuit identification.
5191 | 2151 | 5194 | 5196 | |
---|---|---|---|---|
Customer Reviews |
4.6 out of 5 stars
750
|
4.7 out of 5 stars
157
|
4.9 out of 5 stars
9
|
4.6 out of 5 stars
750
|
For Use With | MRBF Fuses | MRBF Fuses | MRBF Fuses | MRBF Fuses |
Mount Type | Terminal | Terminal | Surface | Surface |
Number of Fuses | 1 | up to 2 | up to 3 | up to 3 |
Source Type | Common | Common | Independent | Common |
Maximum Voltage | 58V DV | 58V DV | 58V DV | 58V DV |
Maximum Amperage per circuit | 300A | 300A | 240A | 240A |
Maximum Amperage per block | 300A | 300A | -- | 300A |
Ingress Protected | IP66 when used with Blue Sea Systems' Terminal (MRBF) Fuses | IP66 when used with Blue Sea Systems' Terminal (MRBF) Fuses | -- | -- |
Ignition Protected | SAE J1171 when used with Blue Sea Systems' MRBF Fuses | SAE J1171 when used with Blue Sea Systems' MRBF Fuses | SAE J1171 when used with Blue Sea Systems' MRBF Fuses | SAE J1171 when used with Blue Sea Systems' MRBF Fuses |
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Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers like the quality, ease of use, size and protection of the terminal block. They mention that it appears to be well made, it provides an elegant and straightforward solution and that it offers excellent system protection. They are also happy with performance. However, some customers are disappointed that it didn't come with a fuse. Opinions are mixed on value.
AI-generated from the text of customer reviews
Customers are satisfied with the quality of the terminal block. They mention that it is high quality, well made, and convenient for termination right at the battery. Some say that it fits fine and tested good, and is perfectly used inside a Grid Point Power Box. Overall, customers are happy with their purchase and recommend it to others.
"Works great, really cool." Read more
"...High quality and perfect for the batteries in my RV." Read more
"Good product, no fuse included, though. Misleading pic/description." Read more
"...circuit for a battery driven inverter on out RV, it fits fine and tested good." Read more
Customers find the terminal block easy to use and install. They mention that it is simple, elegant, and straightforward. The block terminal provides an elegant and straightforward solution to protect the inverter, and it is convenient for termination right at the inlet. Overall, customers find the product to be well-built and assembled, and recommend it to others.
"...'s a true game-changer, delivering on its promises and ensuring a more streamlined and efficient power setup, with a vital caution for installation." Read more
"ease of use" Read more
"Important safety need for marine house bank. Easy to install." Read more
"...Installation was as easy as bottling it on. The protective rubber cap is a nice feature as well." Read more
Customers are satisfied with the performance of the terminal block. They mention that it works great, is very happy with the results, and works great for tight locations and battery relocation.
"Works great, really cool." Read more
"Works great for tight locations. As the description says, this is a fuse block. No fuse is included...." Read more
"...new fuse block is rated for a much higher current, and works well for my application." Read more
"...They work perfectly and actually look pretty good too. I have also purchases the two fuse model which seems like it is more worthy of its price." Read more
Customers are satisfied with the size of the terminal block. They mention that the compact size is genius, and the space-saving design is great. Some also say that it's large, sturdy, and good quality.
"...I connected this very compact and simple fuse setup to protect the inverter...." Read more
"...These MRBF fuses are both compact and much smaller than the resettable DC breakers." Read more
"Really great item from blue seas. I like how it is compact and fits directly onto the alternator post...I bought a 150 amp fuse for it...." Read more
"...Very clever product.This is a compact and simplified method of fusing, especially considering how small their 300 amp fuse is...." Read more
Customers are satisfied with the protection of the terminal block. They mention that it provides excellent system protection and the ultimate in safety and peace of mind on any installation involving.
"Important safety need for marine house bank. Easy to install." Read more
"These are nice to add protection for each Lithium batter in the bank. Able to mount directly on the battery lug...." Read more
"...The ultimate in safety and peace of mind on any installation involving potential for a high amperage DC fault/dead short...." Read more
"I am using this in a trailer restoration project. It is a good way to protect your wiring without extra clutter. Nice compact set up." Read more
Customers appreciate the versatility of the terminal block. They mention that it is a user-friendly solution that resolves common power issues, and is acceptable for a variety of installations. Some customers also say that it's great for overland dual battery systems, perfect for the batteries in their RV, and compact.
"...It's a versatile, user-friendly solution that resolves common power distribution challenges...." Read more
"...High quality and perfect for the batteries in my RV." Read more
"...MRBF fuses was an added bonus that makes these acceptable for a variety of installations." Read more
"...Also the fact that it is rated for 300amps max makes it usable for a wide range of installs." Read more
Customers are mixed about the value of the terminal block. Some mention that it's worth the price and provides cheap insurance for any RV / van battery bank system, while others say that the MRBF fuses are relatively expensive compared with conventional fuses.
"...The MRBF fuses are relatively expensive compared with conventional fuses but that is offset by the reduction in parts count to some extent...." Read more
"...This is cheap insurance for any RV / van battery bank system." Read more
"...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..." Read more
"...Since the fuse cost another $15 - $20 bucks, it is a really expensive gadget when you do the math...." Read more
Customers are disappointed with the fuse of the terminal block. They mention that it does not come with a fuse, as shown in the pictures and description. Some customers also say that the fuse is separate and worthless without it.
"Good product, no fuse included, though. Misleading pic/description." Read more
"No fuse with block" Read more
"Great way to cleanly add a fused terminal to a battery. I used mine to add dc-dc charging from my truck to my rv...." Read more
"...You have to purchase the fuse separately. Don't be fooled, this is not a fuse." Read more
Reviews with images
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Top reviews from the United States
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The outputs from a solar charge controller, a shore power/generator source and an ACR in the alternator charging circuit were combined and connected to our 400Ah house battery bank.
A neat way to combine and fuse several high current circuits.
The MRBF fuses are relatively expensive compared with conventional fuses but that is offset by the reduction in parts count to some extent. Definitely worth spending the extra for the compact and tidy result.
Reviewed in the United States on September 10, 2023
The outputs from a solar charge controller, a shore power/generator source and an ACR in the alternator charging circuit were combined and connected to our 400Ah house battery bank.
A neat way to combine and fuse several high current circuits.
The MRBF fuses are relatively expensive compared with conventional fuses but that is offset by the reduction in parts count to some extent. Definitely worth spending the extra for the compact and tidy result.
The challenge with the Lynx distributor was its limited available slots, necessitating the addition of another Lynx—an expensive and space-consuming proposition. The Blue Sea Systems fuse block terminal provided an elegant and straightforward solution. By attaching it to the end of the Lynx and securely fastening it with a simple bolt-down mechanism, I was able to connect the air conditioner to the Victron system.
This small yet critical addition allowed me to not only connect the air conditioner but also monitor its current, draw, and amperage. In the past, the air conditioner was directly linked to the battery, leaving me guessing about its power consumption, which was far from ideal.
It's essential to note that when installing the Blue Sea Systems 5191 Fuse Block Terminal, make sure you don't over-tighten the fasteners. Refer to the manufacturer's torque specifications to ensure a secure yet safe installation.
In a nutshell, the Blue Sea Systems 5191 Fuse Block Terminal is a must-have addition for anyone aiming to optimize their power management system. It's a versatile, user-friendly solution that resolves common power distribution challenges. I wholeheartedly recommend this product to fellow enthusiasts who wish to take the guesswork out of power monitoring and improve energy efficiency. It's a true game-changer, delivering on its promises and ensuring a more streamlined and efficient power setup, with a vital caution for installation.
Reviewed in the United States on October 20, 2023
The challenge with the Lynx distributor was its limited available slots, necessitating the addition of another Lynx—an expensive and space-consuming proposition. The Blue Sea Systems fuse block terminal provided an elegant and straightforward solution. By attaching it to the end of the Lynx and securely fastening it with a simple bolt-down mechanism, I was able to connect the air conditioner to the Victron system.
This small yet critical addition allowed me to not only connect the air conditioner but also monitor its current, draw, and amperage. In the past, the air conditioner was directly linked to the battery, leaving me guessing about its power consumption, which was far from ideal.
It's essential to note that when installing the Blue Sea Systems 5191 Fuse Block Terminal, make sure you don't over-tighten the fasteners. Refer to the manufacturer's torque specifications to ensure a secure yet safe installation.
In a nutshell, the Blue Sea Systems 5191 Fuse Block Terminal is a must-have addition for anyone aiming to optimize their power management system. It's a versatile, user-friendly solution that resolves common power distribution challenges. I wholeheartedly recommend this product to fellow enthusiasts who wish to take the guesswork out of power monitoring and improve energy efficiency. It's a true game-changer, delivering on its promises and ensuring a more streamlined and efficient power setup, with a vital caution for installation.
Might buy the double or quad fuse setup in the future.
Only way to go and makes it safer.
The quality of this item is right up there with the other Blue Sea items I have used. There is one thing I wish they would change - the safety cover only protects the fuse terminal and not the battery terminal. I would like to see a larger cover that protected both.
I would definitely recommend this product to others. I have always been happy with Blue Sea items.