Manufacturer and seller images. Configuration examples may include additional equipment.
Image source: Blue Sea Systems 5191 Single MRBF Terminal Fuse Block Paid link.Paid link · price checked
Blue Sea Systems prints the part number 5191 under the product heading "MRBF Terminal Fuse Block - 30 to 300A" on its own page (Internet Archive copy of December 5, 2023). The Current Connected store sells it as 5191-BSS; Blue Sea does not print that suffix. Revised on 30 September 2026: The record held no manufacturer SKU; Blue Sea Systems' own page prints the part number 5191.
Source product page: Blue Sea Systems Terminal Fuse Block, product 5191 (Internet Archive copy of December 5, 2023) Checked · Earlier documentLocation: Product heading
Documented
Printed as "Weight 0.16lb (0.07 kg)" on Blue Sea Systems' 5191 page captured on September 23, 2026; the kilogram figure is Blue Sea's own.
Official product page: MRBF Terminal Fuse Block - 30 to 300A - Blue Sea Systems, product 5191 (September 23, 2026 capture) Checked · Earlier documentLocation: Specifications table, Weight row
Documented
Printed as "Optional Accessories Any Marine Rated Battery Fuses" on an Internet Archive copy of Blue Sea Systems' own product page (bluesea.com refused automated requests with HTTP 403 on September 25, 2026) for part 5191 (December 5, 2023). This is the fuse style the block accepts, not a UL fuse class.
Source product page: Blue Sea Systems Terminal Fuse Block, product 5191 (Internet Archive copy of December 5, 2023) Checked · Earlier documentLocation: Optional Accessories
Documented
Seller identifier only; not represented as a manufacturer hardware revision.
Distributor product page: Blue Sea Systems 5191 Single MRBF Terminal Fuse Block: Current Connected exact listing Paid link.CheckedLocation: Exact seller page JSON-LD SKU
Documented
Printed as "Maximum Voltage 58V DC" in the Specifications table of an Internet Archive copy of Blue Sea Systems' own product page (bluesea.com refused automated requests with HTTP 403 on September 25, 2026) for part 5191 (December 5, 2023). No AC rating is printed.
Source product page: Blue Sea Systems Terminal Fuse Block, product 5191 (Internet Archive copy of December 5, 2023) Checked · Earlier documentLocation: Specifications table, "Maximum Voltage" row
Documented
Seller-stated specification from the exact Current Connected page; no separate manufacturer document was used for this value.
Distributor product page: Blue Sea Systems 5191 Single MRBF Terminal Fuse Block: Current Connected exact listing Paid link.CheckedLocation: Exact seller product description
Provisional evidence
Seller-stated specification from the exact Current Connected page; no separate manufacturer document was used for this value.
Distributor product page: Blue Sea Systems 5191 Single MRBF Terminal Fuse Block: Current Connected exact listing Paid link.CheckedLocation: Exact seller product description
Provisional evidence
Seller-stated specification from the exact Current Connected page; no separate manufacturer document was used for this value.
Distributor product page: Blue Sea Systems 5191 Single MRBF Terminal Fuse Block: Current Connected exact listing Paid link.CheckedLocation: Exact seller product description
Provisional evidence
Seller-stated specification from the exact Current Connected page; no separate manufacturer document was used for this value.
Distributor product page: Blue Sea Systems 5191 Single MRBF Terminal Fuse Block: Current Connected exact listing Paid link.CheckedLocation: Exact seller product description
Provisional evidence
Printed as "Weight 0.16lb (0.07 kg)" on Blue Sea Systems' 5191 page captured on September 23, 2026; the kilogram figure is Blue Sea's own.
Official product page: MRBF Terminal Fuse Block - 30 to 300A - Blue Sea Systems, product 5191 (September 23, 2026 capture) Checked · Earlier documentLocation: Specifications table, Weight row
Documented
Printed as "Optional Accessories Any Marine Rated Battery Fuses" on an Internet Archive copy of Blue Sea Systems' own product page (bluesea.com refused automated requests with HTTP 403 on September 25, 2026) for part 5191 (December 5, 2023). This is the fuse style the block accepts, not a UL fuse class.
Source product page: Blue Sea Systems Terminal Fuse Block, product 5191 (Internet Archive copy of December 5, 2023) Checked · Earlier documentLocation: Optional Accessories
Documented
Seller identifier only; not represented as a manufacturer hardware revision.
Distributor product page: Blue Sea Systems 5191 Single MRBF Terminal Fuse Block: Current Connected exact listing Paid link.CheckedLocation: Exact seller page JSON-LD SKU
Documented
Printed as "Maximum Voltage 58V DC" in the Specifications table of an Internet Archive copy of Blue Sea Systems' own product page (bluesea.com refused automated requests with HTTP 403 on September 25, 2026) for part 5191 (December 5, 2023). No AC rating is printed.
Source product page: Blue Sea Systems Terminal Fuse Block, product 5191 (Internet Archive copy of December 5, 2023) Checked · Earlier documentLocation: Specifications table, "Maximum Voltage" row
Documented
Seller-stated specification from the exact Current Connected page; no separate manufacturer document was used for this value.
Distributor product page: Blue Sea Systems 5191 Single MRBF Terminal Fuse Block: Current Connected exact listing Paid link.CheckedLocation: Exact seller product description
Provisional evidence
Seller-stated specification from the exact Current Connected page; no separate manufacturer document was used for this value.
Distributor product page: Blue Sea Systems 5191 Single MRBF Terminal Fuse Block: Current Connected exact listing Paid link.CheckedLocation: Exact seller product description
Provisional evidence
Seller-stated specification from the exact Current Connected page; no separate manufacturer document was used for this value.
Distributor product page: Blue Sea Systems 5191 Single MRBF Terminal Fuse Block: Current Connected exact listing Paid link.CheckedLocation: Exact seller product description
Provisional evidence
Seller-stated specification from the exact Current Connected page; no separate manufacturer document was used for this value.
Distributor product page: Blue Sea Systems 5191 Single MRBF Terminal Fuse Block: Current Connected exact listing Paid link.CheckedLocation: Exact seller product description
Provisional evidence
Seller-stated specification from the exact Current Connected page; no separate manufacturer document was used for this value.
Distributor product page: Blue Sea Systems 5191 Single MRBF Terminal Fuse Block: Current Connected exact listing Paid link.CheckedLocation: Exact seller product description
Provisional evidence
Printed as "Maximum Amperage 300A" in the Specifications table of an Internet Archive copy of Blue Sea Systems' own product page (bluesea.com refused automated requests with HTTP 403 on September 25, 2026) for part 5191 (December 5, 2023).
Source product page: Blue Sea Systems Terminal Fuse Block, product 5191 (Internet Archive copy of December 5, 2023) Checked · Earlier documentLocation: Specifications table, "Maximum Amperage" row
Documented
Printed as "Maximum Voltage 58V DC" in the Specifications table of the Internet Archive copy of Blue Sea Systems' own 5191 page (December 5, 2023). Re-cited on 30 September 2026 to the manufacturer's own document; previously cited to Current Connected (currentconnected.com), which stays listed as an additional source.
Source product page: Blue Sea Systems Terminal Fuse Block, product 5191 (Internet Archive copy of December 5, 2023) Checked · Earlier documentDistributor product page: Blue Sea Systems 5191 Single MRBF Terminal Fuse Block, 58V DC, Mounts on 3/8" Battery Post or Bus Bar Stud, for Marine and Mobile DC Systems Paid link.CheckedLocation: Specifications table, Maximum Voltage row
Documented
Published claims and calculations, not independent test results.
Exact raw HTML capture and hash are retained in the manifest research archive; the product source archive UI is PDF-only.
Location: JSON-LD product identity and visible product description
Retrieved
Seller listing. Technical values cited only as seller statements unless another source is named; seller SKU does not establish a manufacturer hardware revision.
SHA-256: 2d8e39673d49b29a384f0b1c3c0223b117d7ea874c792f6373958bda87e18e54
Earlier revisions, archived captures and copies published by someone other than the manufacturer. Every one stays reachable.
Location: Product listing
Retrieved
Location: Heading, feature list, Specifications table
Retrieved
bluesea.com itself answered automated requests with HTTP 403 that day. It prints the heading, feature list and a Specifications table. Values may have changed since the capture date.
Location: Heading, feature list, Specifications table
Retrieved
Blue Sea Systems' own product page for part 5191, captured on September 23, 2026. It prints the feature list and a Specifications table (ignition protection, maximum amperage, maximum voltage, terminal stud, maximum torque, weight) and links a mounting diagram and a dimensioned drawing as JPEG images. It prints the base part number 5191 only; the -BSS suffix on retail listings is not printed. It names no certification.
No warranty terms on file.
Affiliate links below. Affiliate disclosure
Price for one unit, as listed by the seller. Price checked .
The seller lists this as a new unit. Condition checked .
Distributor product page: Blue Sea Systems 5191 Single MRBF Terminal Fuse Block, 58V DC, Mounts on 3/8" Battery Post or Bus Bar Stud, for Marine and Mobile DC Systems (www.currentconnected.com, October 3, 2026 capture) Paid link.Checked · Earlier documentPrices we read at Current Connected · 52 readings · no change in our readings since
Since · Listing price (USD)
A break in a line is a gap in our readings: no price is drawn for days we did not read.
| Checked (UTC) | Seller | Price |
|---|---|---|
| Sep 16, 2026, 5:51 PM PDT | Current Connected Paid link. | $37.99 |
| Sep 22, 2026, 2:32 AM PDT | Current Connected Paid link. | $37.99 |
| Sep 23, 2026, 3:31 AM PDT | Current Connected Paid link. | $37.99 |
| Sep 24, 2026, 4:32 AM PDT | Current Connected Paid link. | $37.99 |
| Sep 26, 2026, 2:31 AM PDT | Current Connected Paid link. | $37.99 |
| Sep 27, 2026, 3:31 AM PDT | Current Connected Paid link. | $37.99 |
| Sep 28, 2026, 4:32 AM PDT | Current Connected Paid link. | $37.99 |
| Sep 29, 2026, 3:54 PM PDT | Current Connected Paid link. | $37.99 |
| Oct 1, 2026, 1:06 AM PDT | Current Connected Paid link. | $37.99 |
| Oct 2, 2026, 1:06 AM PDT | Current Connected Paid link. | $37.99 |
| Oct 3, 2026, 1:06 AM PDT | Current Connected Paid link. | $37.99 |
| Oct 3, 2026, 11:40 AM PDT | Current Connected Paid link. | $37.99 |
| Oct 4, 2026, 1:06 AM PDT | Current Connected Paid link. | $37.99 |
| Oct 5, 2026, 1:05 AM PDT | Current Connected Paid link. | $37.99 |
| Oct 6, 2026, 1:05 AM PDT | Current Connected Paid link. | $37.99 |
| Oct 7, 2026, 1:15 AM PDT | Current Connected Paid link. | $37.99 |
| Oct 8, 2026, 1:05 AM PDT | Current Connected Paid link. | $37.99 |
| Oct 9, 2026, 1:25 AM PDT | Current Connected Paid link. | $37.99 |
| Oct 10, 2026, 1:46 AM PDT | Current Connected Paid link. | $37.99 |
| Oct 11, 2026, 1:05 AM PDT | Current Connected Paid link. | $37.99 |
| Oct 12, 2026, 1:26 AM PDT | Current Connected Paid link. | $37.99 |
| Oct 13, 2026, 1:15 AM PDT | Current Connected Paid link. | $37.99 |
| Oct 14, 2026, 1:25 AM PDT | Current Connected Paid link. | $37.99 |
| Oct 15, 2026, 1:05 AM PDT | Current Connected Paid link. | $37.99 |
| Oct 16, 2026, 1:05 AM PDT | Current Connected Paid link. | $37.99 |
| Oct 17, 2026, 1:15 AM PDT | Current Connected Paid link. | $37.99 |
| Oct 18, 2026, 1:05 AM PDT | Current Connected Paid link. | $37.99 |
| Oct 19, 2026, 1:45 AM PDT | Current Connected Paid link. | $37.99 |
| Oct 20, 2026, 1:35 AM PDT | Current Connected Paid link. | $37.99 |
| Oct 21, 2026, 1:36 AM PDT | Current Connected Paid link. | $37.99 |
| Oct 22, 2026, 1:16 AM PDT | Current Connected Paid link. | $37.99 |
| Oct 23, 2026, 2:09 AM PDT | Current Connected Paid link. | $37.99 |
| Oct 24, 2026, 1:06 AM PDT | Current Connected Paid link. | $37.99 |
| Oct 25, 2026, 1:06 AM PDT | Current Connected Paid link. | $37.99 |
| Oct 26, 2026, 1:06 AM PDT | Current Connected Paid link. | $37.99 |
| Oct 27, 2026, 1:06 AM PDT | Current Connected Paid link. | $37.99 |
| Oct 28, 2026, 1:26 AM PDT | Current Connected Paid link. | $37.99 |
| Oct 29, 2026, 1:16 AM PDT | Current Connected Paid link. | $37.99 |
| Oct 30, 2026, 1:26 AM PDT | Current Connected Paid link. | $37.99 |
| Oct 31, 2026, 1:26 AM PDT | Current Connected Paid link. | $37.99 |
| Nov 1, 2026, 1:06 AM PDT | Current Connected Paid link. | $37.99 |
| Nov 2, 2026, 1:36 AM PST | Current Connected Paid link. | $37.99 |
| Nov 3, 2026, 1:06 AM PST | Current Connected Paid link. | $37.99 |
| Nov 4, 2026, 1:06 AM PST | Current Connected Paid link. | $37.99 |
| Nov 5, 2026, 1:06 AM PST | Current Connected Paid link. | $37.99 |
| Nov 6, 2026, 1:06 AM PST | Current Connected Paid link. | $37.99 |
| Nov 7, 2026, 1:16 AM PST | Current Connected Paid link. | $37.99 |
| Nov 8, 2026, 1:16 AM PST | Current Connected Paid link. | $37.99 |
| Nov 9, 2026, 1:16 AM PST | Current Connected Paid link. | $37.99 |
| Nov 10, 2026, 1:06 AM PST | Current Connected Paid link. | $37.99 |
| Nov 11, 2026, 1:35 AM PST | Current Connected Paid link. | $37.99 |
| Nov 12, 2026, 1:26 AM PST | Current Connected Paid link. | $37.99 |
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No sourced accessories or replacement parts listed yet.
Blue Sea Systems' own part number, printed under the heading of its 5191 product page captured on September 23, 2026.
Official product page: MRBF Terminal Fuse Block - 30 to 300A - Blue Sea Systems, product 5191 (September 23, 2026 capture) Checked · Earlier documentManufacturer SKU 5191
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No recalls or legal notices on file; this is not a complete recall or court search. All notices · Report a notice
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Prices · price basis. * Calculated; estimates labeled. Value needs confirmation; select it for the reason.
