Blue Sea Systems Class T Fuse - 350 Amp

By Blue Sea SystemsSKU 5120

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Key specs

Units
SKU
5120
Source product page
Sources

Blue Sea Systems prints the part number 5120 under the product heading on its own page (Internet Archive copy of August 12, 2025). The Current Connected store sells it as 5120-BSS; Blue Sea does not print that store code.

Source product page: Wayback Machine copy of https://www.bluesea.com/products/5120, snapshot August 12, 2025 Checked · Earlier document

Location: Product heading

Documented

Weight
0.14 kg0.31 lb converted
Source product page
Sources

Printed as "Weight 0.30lb (0.14 kg)"; the kilogram figure is Blue Sea's own.

Source product page: Wayback Machine copy of https://www.bluesea.com/products/5120, snapshot August 12, 2025 Checked · Earlier document

Location: Specifications table, Weight row

Documented

Fuse class
Class T
Source product page
Sources

Printed as "Class T Fuse - 350 Amp" in the heading, under "Class T Fuses (A3T)".

Source product page: Wayback Machine copy of https://www.bluesea.com/products/5120, snapshot August 12, 2025 Checked · Earlier document

Location: Heading

Documented

AC / DC rating
DC (125V DC maximum)
Source product page
Sources

Printed as "Maximum Voltage 125V DC". No AC rating is printed.

Source product page: Wayback Machine copy of https://www.bluesea.com/products/5120, snapshot August 12, 2025 Checked · Earlier document

Location: Specifications table, Maximum Voltage row

Documented

Current rating
350 A
Source product page
Sources

Printed as "Amperage 350A" on Blue Sea Systems' 5120 page (Internet Archive copy of August 12, 2025).

Source product page: Wayback Machine copy of https://www.bluesea.com/products/5120, snapshot August 12, 2025 Checked · Earlier document

Location: Specifications table, Amperage row

Documented

Voltage rating
125 V
Source product page
Sources

Printed as "Maximum Voltage 125V DC".

Source product page: Wayback Machine copy of https://www.bluesea.com/products/5120, snapshot August 12, 2025 Checked · Earlier document

Location: Specifications table, Maximum Voltage row

Documented

Interrupt rating
20,000 A
Source product page
Sources

Printed as "Interrupt Capacity 20000A @ 125V DC"; the feature list prints "20,000 Ampere Interrupt Capacity (AIC)".

Source product page: Wayback Machine copy of https://www.bluesea.com/products/5120, snapshot August 12, 2025 Checked · Earlier document

Location: Specifications table, Interrupt Capacity row

Documented

All specs6
Weight
0.14 kg0.31 lb converted
Source product page
Sources

Printed as "Weight 0.30lb (0.14 kg)"; the kilogram figure is Blue Sea's own.

Source product page: Wayback Machine copy of https://www.bluesea.com/products/5120, snapshot August 12, 2025 Checked · Earlier document

Location: Specifications table, Weight row

Documented

Fuse class
Class T
Source product page
Sources

Printed as "Class T Fuse - 350 Amp" in the heading, under "Class T Fuses (A3T)".

Source product page: Wayback Machine copy of https://www.bluesea.com/products/5120, snapshot August 12, 2025 Checked · Earlier document

Location: Heading

Documented

AC / DC rating
DC (125V DC maximum)
Source product page
Sources

Printed as "Maximum Voltage 125V DC". No AC rating is printed.

Source product page: Wayback Machine copy of https://www.bluesea.com/products/5120, snapshot August 12, 2025 Checked · Earlier document

Location: Specifications table, Maximum Voltage row

Documented

Current rating
350 A
Source product page
Sources

Printed as "Amperage 350A" on Blue Sea Systems' 5120 page (Internet Archive copy of August 12, 2025).

Source product page: Wayback Machine copy of https://www.bluesea.com/products/5120, snapshot August 12, 2025 Checked · Earlier document

Location: Specifications table, Amperage row

Documented

Voltage rating
125 V
Source product page
Sources

Printed as "Maximum Voltage 125V DC".

Source product page: Wayback Machine copy of https://www.bluesea.com/products/5120, snapshot August 12, 2025 Checked · Earlier document

Location: Specifications table, Maximum Voltage row

Documented

Interrupt rating
20,000 A
Source product page
Sources

Printed as "Interrupt Capacity 20000A @ 125V DC"; the feature list prints "20,000 Ampere Interrupt Capacity (AIC)".

Source product page: Wayback Machine copy of https://www.bluesea.com/products/5120, snapshot August 12, 2025 Checked · Earlier document

Location: Specifications table, Interrupt Capacity row

Documented

Published claims and calculations, not independent test results.

Documents

1 on file
  • WEB
    Wayback Machine copy of https://www.bluesea.com/products/5120, snapshot August 12, 2025Blue Sea SystemsSource product page
    Source details
    Revision
    Not stated
    Revision date
    Not stated

    Archived copy of https://www.bluesea.com/products/5120, Wayback Machine snapshot 20250812150934 (August 12, 2025), 35283 bytes.

    Location: Product heading, feature list, Specifications table

    Retrieved

    Blue Sea Systems' own product page as archived by the Internet Archive at snapshot 20250812150934 (August 12, 2025); it shows what the page printed on that date. The live site answers automated requests with a challenge page, so it was not read.

    Open

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Parts and accessories

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Model history

Model identity

Model
5120

Manufacturer SKU 5120 · US market

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