JLLS Series - UL Class T Fast-Acting Fuse

JLLS Fuses
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Space-saving Class T fuses are the most compact fuses available in ratings above 30 amperes — less than one-third the size of comparable Class R fuses. When rated in accordance with the NEC, Class T fuses provide fast-acting overload and short circuit protection for non-inductive circuits and equipment. Used in inductive circuits, the ampere rating of Class T fuses must be increased to prevent opening on inrush currents. In such instances, Class T fuses may provide only short circuit protection.

For motor and general purpose circuits where space is not critical, we recommend POWR-PRO™ JTD_ID Indicator series, LLNRK/LLSRK series, or FLSR_ID Indicator series.

Applications:

  • Protection of individual electric services and meters.
  • Main switches containing Class T fuses may be used to provide compact protection for meter stacks.
  • Molded case circuit breaker load centers and panelboards have increased interrupting ratings when “series rated” with Littelfuse Class T fuses. Refer to panelboard manufacturers’ literature for UL Listed combination of fuses and panelboards.
  • Series ratings up to 200,000 amperes are available.

Space Saving:

  • Typical three-pole Class T fuse blocks require less than 50% of the panel area required for Class R fuse blocks. Switch enclosures, fuse pullouts, and other equipment using Class T fuses are often correspondingly more compact.

Safety:

  • 200,000 A.I.R. — Reliable interruption of all overcurrents up to 200,000 amperes.
  • Extremely current limiting — Stops damaging short circuit current faster than any mechanical protective device.
  • Fast-Acting — Provides fast-acting overload protection to equipment such as variable speed drives, rectifiers and other equipment containing surge-sensitive components.

Longer Equipment Life:

  • Current limiting design greatly reduces damage to equipment caused by heating and magnetic effects of short circuit currents.

Economical:

  • Extremely current limiting design often permits use of readily available, less costly equipment.
  • Used as input or output fuses for surge-sensitive components, such as variable speed drives and rectifiers, fast-acting Class T JLLS fuses may prevent opening of expensive semiconductor fuses protecting individual components.

Access specifications, certifications, check availability and order parts below

Catalog #Amps (A)VAC (V)VDC (V)Interrupting RatingOpeningSizeStockSamplesCompare
JLLS001160030020000A@300VDCFast-Acting (F)Industrial CartridgeCheckOrder
JLLS002260030020000A@300VDCFast-Acting (F)Industrial CartridgeCheckOrder
JLLS003360030020000A@300VDCFast-Acting (F)Industrial CartridgeCheckOrder
JLLS006660030020000A@300VDCFast-Acting (F)Industrial CartridgeCheckOrder
JLLS0101060030020000A@300VDCFast-Acting (F)Industrial CartridgeCheckOrder
JLLS0151560030020000A@300VDCFast-Acting (F)Industrial CartridgeCheckOrder
JLLS0202060030020000A@300VDCFast-Acting (F)Industrial CartridgeCheckOrder
JLLS0252560030020000A@300VDCFast-Acting (F)Industrial CartridgeCheckOrder
JLLS0303060030020000A@300VDCFast-Acting (F)Industrial CartridgeCheckOrder
JLLS03535600300200000A@600VACFast-Acting (F)Industrial CartridgeCheckOrder
JLLS0404060030020000A@300VDCFast-Acting (F)Industrial CartridgeCheckOrder
JLLS0454560030020000A@300VDCFast-Acting (F)Industrial CartridgeCheckOrder
JLLS0505060030020000A@300VDCFast-Acting (F)Industrial CartridgeCheckOrder
JLLS0606060030020000A@300VDCFast-Acting (F)Industrial CartridgeCheckOrder
JLLS0707060030020000A@300VDCFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS0808060030020000A@300VDCFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS0909060030020000A@300VDCFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS10010060030020000A@300VDCFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS11011060030020000A@300VDCFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS12512560030020000A@300VDCFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS15015060030020000A@300VDCFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS17517560030020000A@300VDCFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS20020060030020000A@300VDCFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS22522560030020000A@300VDCFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS25025060030020000A@300VDCFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS30030060030020000A@300VDCFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS35035060030020000A@300VDCFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS40040060030020000A@300VDCFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS45045060030020000A@300VDCFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS50050060030020000A@300VDCFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS60060060030020000A@300VDCFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS700700600300200000A@600VACFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS80080060030020000A@300VDCFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS90090060030020000A@300VDCFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS1000100060030020000A@300VDCFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS1100110060030020000A@300VDCFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS1200120060030020000A@300VDCFast-Acting (F)Knife-Blade/Bolt-InCheckOrder

  • Showing 2 items
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s)
JLLS001.T FUS 600V F/A CLASS T 1A RoHS No 08/31/2006 PbFree No 08/31/2006 No
JLLS002.T FUS 600V F/A CLASS T 2A RoHS No 08/31/2006 PbFree No 08/31/2006 No
JLLS003.T FUS 600V F/A CLASS T 3A RoHS No 08/31/2006 PbFree No 08/31/2006 No
JLLS006.T FUS 600V F/A CLASS T 6A RoHS No 08/31/2006 PbFree No 08/31/2006 No
JLLS010.T FUS 600V F/A CLASS T 10A RoHS No 08/31/2006 PbFree No 08/31/2006 REACH191_Declaration_JLLS010.T_08-14-2018 No
Does not Contain
JLLS015.T FUS 600V F/A CLASS T 15A RoHS No 08/31/2006 PbFree No 08/31/2006 No
JLLS020.T FUS 600V F/A CLASS T 20A RoHS No 08/31/2006 PbFree No 08/31/2006 CoC_RoHS10_JLLS020.T_10-14-2019 REACH201_Declaration_JLLS020.T_10-14-2019 No
Does not Contain
JLLS025.T FUS 600V F/A CLASS T 25A RoHS No 08/31/2006 PbFree No 08/31/2006 CoC_RoHS10_JLLS025.T_09-12-2018 REACH191_Declaration_JLLS025.T_09-12-2018 No
Does not Contain
JLLS030.T FUS 600V F/A CLASS T 30A RoHS No 08/31/2006 PbFree No 08/31/2006 CoC_RoHS10_JLLS030.T_12-10-2020 REACH209_Declaration_JLLS030.T_12-09-2020 No
Does not Contain
JLLS045.T FUS 600V F/A CLASS T 45A RoHS No 05/09/2006 PbFree No 05/09/2006 No
JLLS050.T FUS 600V F/A CLASS T 50A RoHS No 05/09/2006 PbFree No 05/09/2006 CoC_RoHS10_JLLS050.T_02-05-2020 REACH205_Declaration_JLLS050.T_02-05-2020 No
Does not Contain
JLLS060.T FUS 600V F/A CLASS T 60A RoHS No 05/09/2006 PbFree No 05/09/2006 CoC_RoHS10_JLLS060.T_01-04-2021 REACH209_Declaration_JLLS060.T_01-06-2021 No
Does not Contain
JLLS070.V FUS 600V F/A CLASS T 70A RoHS No 08/31/2006 PbFree No 08/31/2006 CoC_RoHS10_JLLS070.V_01-04-2021 REACH209_Declaration_JLLS070.V_01-06-2021 No
Does not Contain
JLLS080.V FUS 600V F/A CLASS T 80A RoHS No 08/31/2006 PbFree No 08/31/2006 CoC_RoHS10_JLLS080.V_10-10-2019 REACH201_Declaration_JLLS080.V_10-10-2019 No
Does not Contain
JLLS090.V FUS 600V F/A CLASS T 90A RoHS No 08/31/2006 PbFree No 08/31/2006 CoC_RoHS10_JLLS090.V_01-04-2021 REACH209_Declaration_JLLS090.V_01-06-2021 No
Does not Contain
JLLS100.V FUS 600V F/A CLASS T 100A RoHS No 08/31/2006 PbFree No 08/31/2006 CoC_RoHS10_JLLS100.V_10-14-2019 REACH201_Declaration_JLLS100.V_10-14-2019 No
Does not Contain
JLLS110.X FUS 600V F/A CLASS T 110A RoHS No 08/31/2006 PbFree No 08/31/2006 CoC_RoHS10_JLLS110.X_11-11-2020 REACH209_Declaration_JLLS110.X_11-11-2020 No
Does not Contain
JLLS125.X FUS 600V F/A CLASS T 125A RoHS No 08/31/2006 PbFree No 08/31/2006 CoC_RoHS10_JLLS125.X_10-02-2020 REACH209_Declaration_JLLS125.X_10-02-2020 No
Does not Contain
JLLS150.X FUS 600V F/A CLASS T 150A RoHS No 08/31/2006 PbFree No 08/31/2006 CoC_RoHS10_JLLS150.X_10-10-2019 REACH201_Declaration_JLLS150.X_10-10-2019 No
Does not Contain
JLLS175.X FUS 600V F/A CLASS T 175A RoHS No 08/31/2006 PbFree No 08/31/2006 CoC_RoHS10_JLLS175.X_07-08-2019 REACH209_Declaration_JLLS175.X_10-02-2020 No
Does not Contain
JLLS175.Z RoHS No 08/31/2006 PbFree No 08/31/2006 No
JLLS200.X FUS 600V F/A CLASS T 200A RoHS No 08/31/2006 PbFree No 08/31/2006 CoC_RoHS10_JLLS200.X_05-30-2019 REACH209_Declaration_JLLS200.X_10-02-2020 No
Does not Contain
JLLS225.X FUS 600V F/A CLASS T 225A RoHS No 08/31/2006 PbFree No 08/31/2006 CoC_RoHS10_JLLS225.X_08-09-2019 REACH209_Declaration_JLLS225.X_10-02-2020 No
Does not Contain
JLLS250.X FUS 600V F/A CLASS T 250A RoHS No 08/31/2006 PbFree No 08/31/2006 CoC_RoHS10_JLLS250.X_08-09-2019 REACH209_Declaration_JLLS250.X_10-02-2020 No
Does not Contain
JLLS300.X FUS 600V F/A CLASS T 300A RoHS No 08/31/2006 PbFree No 08/31/2006 CoC_RoHS10_JLLS300.X_08-09-2019 REACH209_Declaration_JLLS300.X_10-02-2020 No
Does not Contain
JLLS350.X FUS 600V F/A CLASS T 350A RoHS No 08/31/2006 PbFree No 08/31/2006 CoC_RoHS10_JLLS350.X_08-09-2019 REACH209_Declaration_JLLS350.X_10-02-2020 No
Does not Contain
JLLS400.X FUS 600V F/A CLASS T 400A RoHS No 08/31/2006 PbFree No 08/31/2006 CoC_RoHS10_JLLS400.X_08-09-2019 REACH201_Declaration_JLLS400.X_08-09-2019 No
Does not Contain
JLLS450.X FUS 600V F/A CLASS T 450A RoHS No 08/31/2006 PbFree No 08/31/2006 CoC_RoHS10_JLLS450.X_10-14-2019 REACH201_Declaration_JLLS450.X_10-14-2019 No
Does not Contain
JLLS500.X FUS 600V F/A CLASS T 500A RoHS No 08/31/2006 PbFree No 08/31/2006 CoC_RoHS10_JLLS500.X_10-14-2019 REACH201_Declaration_JLLS500.X_10-14-2019 No
Does not Contain
JLLS600.X FUS 600V F/A CLASS T 600A RoHS No 08/31/2006 PbFree No 08/31/2006 No
JLLS700.X FUS 600V F/A CLASS T 700A RoHS No 08/31/2006 PbFree No 08/31/2006 No
JLLS800.X s06094aV F/A CLASS T 800A RoHS No 08/31/2006 PbFree No 08/31/2006 No
JLLS900.X FUS 600V F/A CLASS T 900A RoHS No PbFree No No
JLLS1000X FUS 600V F/A CLASS T 1000A RoHS No PbFree No No
JLLS1100X FUS 600V F/A CLASS T 1100A RoHS No PbFree No No
JLLS1200X FUS 600V F/A CLASS T 1200A RoHS No PbFree No No
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