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Fuses and fuse holders

Bussmann series Class T Fuses

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Authenticated:
The product is verified as being authentic; however, this does not guarantee the condition or fit for purpose of the product.

Bussmann series Class T Fuses

Bussmann's Class T current-limiting, fast-acting fuses. Provides 10X better current limitation to help prevent equipment damage caused by short-circuit events. 200 kA Interrupting rating complies with NEC® Section 110.9 for today’s large capacity systems. Small, space-saving fuses provide a high degree of current limitation on short-circuits for excellent component protection.

Core features

Series combination ratings with branch circuit breakers allows broad range of coverage, independent of breaker manufacturer.
Current limitation for non-inductive circuits provides Class T current-limiting response to maximum ground fault and short-circuit conditions.
200kA interrupting rating provides high ratings at all circuit locations. Small footprint allows more efficient use of available space.

Benefits of Class T fuses

Small, space-saving fuses provide 10x better current limitation to help prevent equipment damage caused by short-circuit events.

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Bussmann series Fuseology

An introduction to understanding fuses and how they are applied for providing overcurrent protection.

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Specifications

91 Results

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BK/25499-09000

Specifications
Resources

Eaton Bussmann series 25499 fuse, 20A, Gold plated brass endcaps

BK/25499-09005

Specifications
Resources

Eaton Bussmann series 25499 fuse, 8A, Nickel-plated brass endcaps

BK/JJS-175

Specifications
Resources

Eaton Bussmann series JJS fuse, Small footprint, 600V, 175A, 200 kAIC at 600 Vac, Non Indicating, Current-limiting, Very Fast Acting Fuse, Class T

BK/JJS-200

Specifications
Resources

Eaton Bussmann series JJS fuse, Small footprint, 600V, 200A, 200 kAIC at 600 Vac, Non Indicating, Current-limiting, Very Fast Acting Fuse, Class T

BK/JJS-3

Specifications
Resources

Eaton Bussmann series JJS fuse, Small footprint, 600V, 3A, 200 kAIC at 600 Vac, Non Indicating, Current-limiting, Very Fast Acting Fuse, Class T

BK/JJS-30

Specifications
Resources

Eaton Bussmann series JJS fuse, Small footprint, 600V, 30A, 200 kAIC at 600 Vac, Non Indicating, Current-limiting, Very Fast Acting Fuse, Class T

JJN-1

Specifications
Resources

Eaton Bussmann series JJN fuse, 300V, 1A, 200 kAIC at 300 Vac, Non Indicating, Current-limiting, Very Fast Acting Fuse, Class T

JJN-10

Specifications
Resources

Eaton Bussmann series JJN fuse, 300V, 10A, 200 kAIC at 300 Vac, Non Indicating, Current-limiting, Very Fast Acting Fuse, Ferrule end X ferrule end, Class T

JJN-1000

Specifications
Resources

Eaton Bussmann series JJN fuse, 300 Vac, 170 Vdc, 1000A, 200 kAIC at 300 Vac, 100 kAIC at 170 Vdc, Non Indicating, Current-limiting, Very Fast Acting Fuse, Bolted blade end X bolted blade end, Class T

JJN-110

Specifications
Resources

Eaton Bussmann series JJN fuse, 300 Vac, 160 Vdc, 110A, 200 kAIC at 300 Vac, 20 kAIC at 160 Vdc, Non Indicating, Current-limiting, Very Fast Acting Fuse, Bolted blade end X bolted blade end, Class T

JJN-1200

Specifications
Resources

Eaton Bussmann series JJN fuse, 300 Vac, 170 Vdc, 1200A, 200 kAIC at 300 Vac, 100 kAIC at 170 Vdc, Non Indicating, Current-limiting, Very Fast Acting Fuse, Bolted blade end X bolted blade end, Class T

JJN-125

Specifications
Resources

Eaton Bussmann series JJN fuse, 300 Vac, 160 Vdc, 125A, 200 kAIC at 300 Vac, 20 kAIC at 160 Vdc, Non Indicating, Current-limiting, Very Fast Acting Fuse, Bolted blade end X bolted blade end, Class T

JJN-15

Specifications
Resources

Eaton Bussmann series JJN fuse, 300 Vac, 160 Vdc, 15A, 200 kAIC at 300 Vac, 20 kAIC at 160 Vdc, Non Indicating, Current-limiting, Very Fast Acting Fuse, Ferrule end X ferrule end, Class T

JJN-150

Specifications
Resources

Eaton Bussmann series JJN fuse, 300 Vac, 160 Vdc, 150A, 200 kAIC at 300 Vac, 20 kAIC at 160 Vdc, Non Indicating, Current-limiting, Very Fast Acting Fuse, Bolted blade end X bolted blade end, Class T

JJN-175

Specifications
Resources

Eaton Bussmann series JJN fuse, 300 Vac, 160 Vdc, 175A, 200 kAIC at 300 Vac, 20 kAIC at 160 Vdc, Non Indicating, Current-limiting, Very Fast Acting Fuse, Bolted blade end X bolted blade end, Class T

JJN-2

Specifications
Resources

Eaton Bussmann series JJN fuse, 300V, 2A, 200 kAIC at 300 Vac, Non Indicating, Current-limiting, Very Fast Acting Fuse, Class T

JJN-20

Specifications
Resources

Eaton Bussmann series JJN fuse, 300 Vac, 160 Vdc, 20A, 200 kAIC at 300 Vac, 20 kAIC at 160 Vdc, Non Indicating, Current-limiting, Very Fast Acting Fuse, Ferrule end X ferrule end, Class T

JJN-200

Specifications
Resources

Eaton Bussmann series JJN fuse, 300 Vac, 160 Vdc, 200A, 200 kAIC at 300 Vac, 20 kAIC at 160 Vdc, Non Indicating, Current-limiting, Very Fast Acting Fuse, Bolted blade end X bolted blade end, Class T

JJN-20L

Specifications
Resources

Eaton Bussmann series JJN fuse, Non Indicating, Class T - JJN-20L

JJN-225

Specifications
Resources

Eaton Bussmann series JJN fuse, 300 Vac, 160 Vdc, 225A, 200 kAIC at 300 Vac, 20 kAIC at 160 Vdc, Non Indicating, Current-limiting, Very Fast Acting Fuse, Bolted blade end X bolted blade end, Class T

JJN-25

Specifications
Resources

Eaton Bussmann series JJN fuse, 300 Vac, 160 Vdc, 25A, 200 kAIC at 300 Vac, 20 kAIC at 160 Vdc, Non Indicating, Current-limiting, Very Fast Acting Fuse, Ferrule end X ferrule end, Class T

JJN-250

Specifications
Resources

Eaton Bussmann series JJN fuse, 300 Vac, 160 Vdc, 250A, 200 kAIC at 300 Vac, 20 kAIC at 160 Vdc, Non Indicating, Current-limiting, Very Fast Acting Fuse, Bolted blade end X bolted blade end, Class T

JJN-25L

Specifications
Resources

Eaton Bussmann series JJN fuse, Non Indicating, Class T - JJN-25L

JJN-3

Specifications
Resources

Eaton Bussmann series JJN fuse, 300V, 3A, 200 kAIC at 300 Vac, Non Indicating, Current-limiting, Very Fast Acting Fuse, Class T

JJN-30

Specifications
Resources

Eaton Bussmann series JJN fuse, 300 Vac, 160 Vdc, 30A, 200 kAIC at 300 Vac, 20 kAIC at 160 Vdc, Non Indicating, Current-limiting, Very Fast Acting Fuse, Ferrule end X ferrule end, Class T

JJN-300

Specifications
Resources

Eaton Bussmann series JJN fuse, 300 Vac, 160 Vdc, 300A, 200 kAIC at 300 Vac, 20 kAIC at 160 Vdc, Non Indicating, Current-limiting, Very Fast Acting Fuse, Bolted blade end X bolted blade end, Class T

JJN-30L

Specifications
Resources

Eaton Bussmann series JJN fuse, Non Indicating, Class T - JJN-30L

JJN-35

Specifications
Resources

Eaton Bussmann series JJN fuse, 300 Vac, 160 Vdc, 35A, 200 kAIC at 300 Vac, 20 kAIC at 160 Vdc, Non Indicating, Current-limiting, Very Fast Acting Fuse, Ferrule end X ferrule end, Class T

JJN-350

Specifications
Resources

Eaton Bussmann series JJN fuse, 300 Vac, 160 Vdc, 350A, 200 kAIC at 300 Vac, 20 kAIC at 160 Vdc, Non Indicating, Current-limiting, Very Fast Acting Fuse, Bolted blade end X bolted blade end, Class T

JJN-35L

Specifications
Resources

Eaton Bussmann series JJN fuse, Non Indicating, Class T - JJN-35L

JJN-40

Specifications
Resources

Eaton Bussmann series JJN fuse, 300 Vac, 160 Vdc, 40A, 200 kAIC at 300 Vac, 20 kAIC at 160 Vdc, Non Indicating, Current-limiting, Very Fast Acting Fuse, Ferrule end X ferrule end, Class T

JJN-400

Specifications
Resources

Eaton Bussmann series JJN fuse, 300 Vac, 160 Vdc, 400A, 200 kAIC at 300 Vac, 20 kAIC at 160 Vdc, Non Indicating, Current-limiting, Very Fast Acting Fuse, Bolted blade end X bolted blade end, Class T

JJN-40L

Specifications
Resources

Eaton Bussmann series JJN fuse, Non Indicating, Class T - JJN-40L

JJN-40LS

Specifications
Resources

Eaton Bussmann series JJN fuse, Non Indicating, Class T - JJN-40LS

JJN-45

Specifications
Resources

Eaton Bussmann series JJN fuse, 300 Vac, 160 Vdc, 45A, 200 kAIC at 300 Vac, 20 kAIC at 160 Vdc, Non Indicating, Current-limiting, Very Fast Acting Fuse, Ferrule end X ferrule end, Class T

JJN-450

Specifications
Resources

Eaton Bussmann series JJN fuse, 300 Vac, 160 Vdc, 450A, 200 kAIC at 300 Vac, 20 kAIC at 160 Vdc, Non Indicating, Current-limiting, Very Fast Acting Fuse, Bolted blade end X bolted blade end, Class T

JJN-45L

Specifications
Resources

Eaton Bussmann series JJN fuse, Non Indicating, Class T - JJN-45L

JJN-50

Specifications
Resources

Eaton Bussmann series JJN fuse, 300 Vac, 160 Vdc, 50A, 200 kAIC at 300 Vac, 20 kAIC at 160 Vdc, Non Indicating, Current-limiting, Very Fast Acting Fuse, Ferrule end X ferrule end, Class T

JJN-500

Specifications
Resources

Eaton Bussmann series JJN fuse, 300 Vac, 160 Vdc, 500A, 200 kAIC at 300 Vac, 20 kAIC at 160 Vdc, Non Indicating, Current-limiting, Very Fast Acting Fuse, Bolted blade end X bolted blade end, Class T

JJN-50L

Specifications
Resources

Eaton Bussmann series JJN fuse, Non Indicating, Class T - JJN-50L

JJN-50V

Specifications
Resources

Eaton Bussmann series JJN fuse, Non Indicating, Class T - JJN-50V

JJN-6

Specifications
Resources

Eaton Bussmann series JJN fuse, 300V, 6A, 200 kAIC at 300 Vac, Non Indicating, Current-limiting, Very Fast Acting Fuse, Ferrule end X ferrule end, Class T

JJN-60

Specifications
Resources

Eaton Bussmann series JJN fuse, 300 Vac, 160 Vdc, 60A, 200 kAIC at 300 Vac, 20 kAIC at 160 Vdc, Non Indicating, Current-limiting, Very Fast Acting Fuse, Ferrule end X ferrule end, Class T

JJN-600

Specifications
Resources

Eaton Bussmann series JJN fuse, 300 Vac, 160 Vdc, 600A, 200 kAIC at 300 Vac, 20 kAIC at 160 Vdc, Non Indicating, Current-limiting, Very Fast Acting Fuse, Bolted blade end X bolted blade end, Class T

JJN-60L

Specifications
Resources

Eaton Bussmann series JJN fuse, Non Indicating, Class T - JJN-60L

JJN-60LS

Specifications
Resources

Eaton Bussmann series JJN fuse, Non Indicating, Class T - JJN-60LS

JJN-60V

Specifications
Resources

Eaton Bussmann series JJN fuse, Non Indicating, Class T - JJN-60V

JJN-70

Specifications
Resources

Eaton Bussmann series JJN fuse, 300 Vac, 160 Vdc, 70A, 200 kAIC at 300 Vac, 20 kAIC at 160 Vdc, Non Indicating, Current-limiting, Very Fast Acting Fuse, Bolted blade end X bolted blade end, Class T

JJN-700

Specifications
Resources

Eaton Bussmann series JJN fuse, 300 Vac, 170 Vdc, 700A, 200 kAIC at 300 Vac, 100 kAIC at 170 Vdc, Non Indicating, Current-limiting, Very Fast Acting Fuse, Bolted blade end X bolted blade end, Class T

JJN-80

Specifications
Resources

Eaton Bussmann series JJN fuse, 300 Vac, 160 Vdc, 80A, 200 kAIC at 300 Vac, 20 kAIC at 160 Vdc, Non Indicating, Current-limiting, Very Fast Acting Fuse, Bolted blade end X bolted blade end, Class T

JJN-800

Specifications
Resources

Eaton Bussmann series JJN fuse, 300 Vac, 170 Vdc, 800A, 200 kAIC at 300 Vac, 100 kAIC at 170 Vdc, Non Indicating, Current-limiting, Very Fast Acting Fuse, Bolted blade end X bolted blade end, Class T

JJN-90

Specifications
Resources

Eaton Bussmann series JJN fuse, 300 Vac, 160 Vdc, 90A, 200 kAIC at 300 Vac, 20 kAIC at 160 Vdc, Non Indicating, Current-limiting, Very Fast Acting Fuse, Bolted blade end X bolted blade end, Class T

JJS-1

Specifications
Resources

Eaton Bussmann series JJS fuse, Small footprint, 600V, 1A, 200 kAIC at 600 Vac, Non Indicating, Current-limiting, Very Fast Acting Fuse, Ferrule end X ferrule end, Class T

JJS-10

Specifications
Resources

Eaton Bussmann series JJS fuse, Small footprint, 600V, 10A, 200 kAIC at 600 Vac, Non Indicating, Current-limiting, Very Fast Acting Fuse, Ferrule end X ferrule end, Class T

JJS-100

Specifications
Resources

Eaton Bussmann series JJS fuse, Small footprint, 600V, 100A, 200 kAIC at 600 Vac, Non Indicating, Current-limiting, Very Fast Acting Fuse, Bolted blade end X bolted blade end, Class T

JJS-110

Specifications
Resources

Eaton Bussmann series JJS fuse, Small footprint, 600V, 110A, 200 kAIC at 600 Vac, Non Indicating, Current-limiting, Very Fast Acting Fuse, Bolted blade end X bolted blade end, Class T

JJS-125

Specifications
Resources

Eaton Bussmann series JJS fuse, Small footprint, 600V, 125A, 200 kAIC at 600 Vac, Non Indicating, Current-limiting, Very Fast Acting Fuse, Bolted blade end X bolted blade end, Class T

JJS-15

Specifications
Resources

Eaton Bussmann series JJS fuse, Small footprint, 600V, 15A, 200 kAIC at 600 Vac, Non Indicating, Current-limiting, Very Fast Acting Fuse, Ferrule end X ferrule end, Class T

JJS-150

Specifications
Resources

Eaton Bussmann series JJS fuse, Small footprint, 600V, 150A, 200 kAIC at 600 Vac, Non Indicating, Current-limiting, Very Fast Acting Fuse, Bolted blade end X bolted blade end, Class T

JJS-15LS

Specifications
Resources

Eaton Bussmann series JJS fuse - JJS-15LS

Download Links

Product notifications

Bussmann series JJN and JJS Limitron product change notice

Product change notice on fuse labeling JJN and JJS Class T fuses.

(PDF 94 KB, 12/12/2019)

Technical data sheets

Bussmann series JJN 300 volt Class T fuse data sheet no. 1025

Specifications and technical details for the 300V Class T JJN fuse in ratings from 1 to 1200 amps

(PDF 843 KB, 12/12/2019)
Bussmann series JJS 600 volt Class T fuse data sheet no. 1029

Specifications and technical details for the 600V UL Class T JJS fuse in ratings from 1 to 800 amps.

(PDF 1 MB, 7/1/2019)

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Products
Electrical circuit protection
Fuses and fuse holders
Bussmann series Class T fuses

Eaton’s mission is to improve the quality of life and the environment through the use of power management technologies and services. We provide sustainable solutions that help our customers effectively manage electrical, hydraulic and mechanical power – more safely, more efficiently and more reliably. Eaton’s 2019 revenues were $21.4 billion, and we sell products to customers in more than 175 countries.

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