Component type
terminal_fuse_holder
- 5191 MRBF Terminal Fuse Block · Exact part-number specifications and features · rev. current product page
Verified current equipment
Blue Sea Systems 5191 MRBF Terminal Fuse Block
Battery-terminal MRBF fuse holder rated up to 58 VDC and 300 A; the fuse is sold separately and determines circuit protection.
Best for: Compact main or inverter DC protection only with an exact, correctly rated MRBF fuse and a fault-current review; holder ratings are not fuse interrupt ratings.
Key facts
- Component type
- terminal_fuse_holder
- Fuse family
- MRBF terminal fuse, 30-300 A
- Fuse positions
- 1 positions
- Bos Enclosure Only
- Yes
- Bos Fuse Included
- No
Specifications alone do not confirm that a product fits your RV. Match the RV model and year to documented fitment evidence, then check system voltage, battery chemistry, wiring, protection and input/output limits before buying.
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BROWSE RV EQUIPMENT →Specifications and source evidence
Start with the key facts above. Open the complete evidence only when you need the detailed values and citations.
View all 15 verified specifications and sources
Current rating
300 A
Conditions: {"applies_to":"holder","requires_appropriately_sized_fuse_and_wire":true}
- 5191 MRBF Terminal Fuse Block · Exact part-number specifications and features · rev. current product page
DC voltage rating
58 V
Conditions: {"applies_to":"holder"}
- 5191 MRBF Terminal Fuse Block · Exact part-number specifications and features · rev. current product page
Bos Enclosure Only
Yes
- 5191 MRBF Terminal Fuse Block · Exact part-number specifications and features · rev. current product page
Fuse family
MRBF terminal fuse, 30-300 A
- 5191 MRBF Terminal Fuse Block · Exact part-number specifications and features · rev. current product page
Bos Fuse Included
No
- 5191 MRBF Terminal Fuse Block · Exact part-number specifications and features · rev. current product page
Fuse positions
1 positions
- 5191 MRBF Terminal Fuse Block · Exact part-number specifications and features · rev. current product page
Bos Fuse Rating Max A
300 A
- 5191 MRBF Terminal Fuse Block · Exact part-number specifications and features · rev. current product page
Bos Fuse Rating Min A
30 A
- 5191 MRBF Terminal Fuse Block · Exact part-number specifications and features · rev. current product page
Bos Ignition Protected
No
Conditions: {"basis":"holder_specification_alone"}
- 5191 MRBF Terminal Fuse Block · Features and regulatory specifications · rev. current product page
Bos Ignition Protection Condition
Ignition protected only when used with a Blue Sea Systems MRBF Terminal Fuse
- 5191 MRBF Terminal Fuse Block · Features and regulatory specifications · rev. current product page
Bos Mounting Type
battery-terminal mount
- 5191 MRBF Terminal Fuse Block · Exact part-number specifications and features · rev. current product page
Bos Terminal Stud
M8 (5/16) fuse terminal; mounts on 3/8 battery stud
- 5191 MRBF Terminal Fuse Block · Exact part-number specifications and features · rev. current product page
Bos Terminal Torque Nm
8.47 Nm
Conditions: {"connection":"M8_fuse_terminal"}
- 5191 MRBF Terminal Fuse Block · Exact part-number specifications and features · rev. current product page
Bos Termination Method
5/16-inch ring terminal on M8 isolated stud
- 5191 MRBF Terminal Fuse Block · Exact part-number specifications and features · rev. current product page
Why you can trust this record
Only verified claims with claim-level provenance are returned. Conditions, units and source locators must be preserved when citing a fact.
Heeler RV keeps commerce downstream of technical selection. Affiliate status never changes specifications, lifecycle, replacement evidence, fitment evidence or comparison ranking.