JLLS Series - UL Class T Fast-Acting Fuse

Series: JLLS
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Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

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.

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Access specifications, certifications, check availability and order parts below

Catalog #Amps (A)Interrupting RatingOpeningSizeStockSamplesCompare
JLLS001120 kA @ 300 VdcFast-Acting (F)Industrial CartridgeCheckOrder
JLLS002220 kA @ 300 VdcFast-Acting (F)Industrial CartridgeCheckOrder
JLLS003320 kA @ 300 VdcFast-Acting (F)Industrial CartridgeCheckOrder
JLLS006620 kA @ 300 VdcFast-Acting (F)Industrial CartridgeCheckOrder
JLLS0101020 kA @ 300 VdcFast-Acting (F)Industrial CartridgeCheckOrder
JLLS0151520 kA @ 300 VdcFast-Acting (F)Industrial CartridgeCheckOrder
JLLS0202020 kA @ 300 VdcFast-Acting (F)Industrial CartridgeCheckOrder
JLLS0252520 kA @ 300 VdcFast-Acting (F)Industrial CartridgeCheckOrder
JLLS0303020 kA @ 300 VdcFast-Acting (F)Industrial CartridgeCheckOrder
JLLS03535200 kA @ 300 VacFast-Acting (F)Industrial CartridgeCheckOrder
JLLS0404020 kA @ 300 VdcFast-Acting (F)Industrial CartridgeCheckOrder
JLLS0454520 kA @ 300 VdcFast-Acting (F)Industrial CartridgeCheckOrder
JLLS0505020 kA @ 300 VdcFast-Acting (F)Industrial CartridgeCheckOrder
JLLS0606020 kA @ 300 VdcFast-Acting (F)Industrial CartridgeCheckOrder
JLLS0707020 kA @ 300 VdcFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS0808020 kA @ 300 VdcFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS0909020 kA @ 300 VdcFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS10010020 kA @ 300 VdcFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS11011020 kA @ 300 VdcFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS12512520 kA @ 300 VdcFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS15015020 kA @ 300 VdcFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS17517520 kA @ 300 VdcFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS20020020 kA @ 300 VdcFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS22522520 kA @ 300 VdcFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS25025020 kA @ 300 VdcFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS30030020 kA @ 300 VdcFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS35035020 kA @ 300 VdcFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS40040020 kA @ 300 VdcFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS45045020 kA @ 300 VdcFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS50050020 kA @ 300 VdcFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS60060020 kA @ 300 VdcFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS700700200 kA @ 300 VacFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS80080020 kA @ 300 VdcFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS90090020 kA @ 300 VdcFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS1000100020 kA @ 300 VdcFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS1100110020 kA @ 300 VdcFast-Acting (F)Knife-Blade/Bolt-InCheckOrder
JLLS1200120020 kA @ 300 VdcFast-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) IPC-Material Declaration
JLLS001.T FUS 600V F/A CLASS T 1A RoHS No 08/31/2006 PbFree No No
JLLS002.T FUS 600V F/A CLASS T 2A RoHS No 08/31/2006 PbFree No No
JLLS003.T FUS 600V F/A CLASS T 3A RoHS No 08/31/2006 PbFree No No
JLLS006.T FUS 600V F/A CLASS T 6A RoHS No 08/31/2006 PbFree No No
JLLS010.T FUS 600V F/A CLASS T 10A RoHS No 08/31/2006 PbFree No 08/31/2006 No
JLLS015.T FUS 600V F/A CLASS T 15A RoHS No 08/31/2006 PbFree No No
JLLS020.T FUS 600V F/A CLASS T 20A RoHS No 08/31/2006 PbFree No 08/31/2006 No
JLLS025.T FUS 600V F/A CLASS T 25A RoHS No 08/31/2006 PbFree No 08/31/2006 No
JLLS030.T FUS 600V F/A CLASS T 30A RoHS No 08/31/2006 PbFree No 08/31/2006
JLLS045.T FUS 600V F/A CLASS T 45A RoHS No 05/09/2006 PbFree No No
JLLS050.T FUS 600V F/A CLASS T 50A RoHS No 05/09/2006 PbFree No 05/09/2006 No
JLLS060.T FUS 600V F/A CLASS T 60A RoHS No 05/09/2006 PbFree No No
JLLS070.V FUS 600V F/A CLASS T 70A RoHS No 08/31/2006 PbFree No No
JLLS080.V FUS 600V F/A CLASS T 80A RoHS No 08/31/2006 PbFree No 08/31/2006 No
JLLS090.V FUS 600V F/A CLASS T 90A RoHS No 08/31/2006 PbFree No No
JLLS100.V FUS 600V F/A CLASS T 100A RoHS No 08/31/2006 PbFree No 08/31/2006 No
JLLS110.X FUS 600V F/A CLASS T 110A RoHS No 08/31/2006 PbFree No 08/31/2006
JLLS125.X FUS 600V F/A CLASS T 125A RoHS No 08/31/2006 PbFree No 08/31/2006 No
JLLS150.X FUS 600V F/A CLASS T 150A RoHS No 08/31/2006 PbFree No 08/31/2006 No
JLLS175.X FUS 600V F/A CLASS T 175A 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 No
JLLS225.X FUS 600V F/A CLASS T 225A RoHS No 08/31/2006 PbFree No 08/31/2006 No
JLLS250.X FUS 600V F/A CLASS T 250A RoHS No 08/31/2006 PbFree No 08/31/2006 No
JLLS300.X FUS 600V F/A CLASS T 300A RoHS No 08/31/2006 PbFree No 08/31/2006 No
JLLS350.X FUS 600V F/A CLASS T 350A RoHS No 08/31/2006 PbFree No 08/31/2006 No
JLLS400.X FUS 600V F/A CLASS T 400A RoHS No 08/31/2006 PbFree No 08/31/2006 No
JLLS450.X FUS 600V F/A CLASS T 450A RoHS No 08/31/2006 PbFree No 08/31/2006 No
JLLS500.X FUS 600V F/A CLASS T 500A RoHS No 08/31/2006 PbFree No 08/31/2006 No
JLLS600.X FUS 600V F/A CLASS T 600A RoHS No 08/31/2006 PbFree No No
JLLS600.XXP FUS 600V F/A CLASS T 600A PLTD RoHS No 08/25/2021 PbFree No 08/25/2021 No
08/25/2021
JLLS700.X FUS 600V F/A CLASS T 700A RoHS No 08/31/2006 PbFree No No
JLLS800.X FUS 600V F/A CLASS T 800A RoHS No 08/31/2006 PbFree No No
JLLS800.XXP FUS 600V F/A CLASS T 800A PLTD RoHS No 08/23/2021 PbFree No 08/23/2021 No
08/23/2021
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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