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Littelfuse JLLN300 Powr-Gard® Fast-Acting Fuse; Class T, 300 Amp, 300 Volt AC, 125 Volt DC, Bolt Mount

  • Littelfuse JLLN300 Littelfuse JLLN300 Powr-Gard® Fast-Acting Fuse; Class T, 300 Amp, 300 Volt AC, 125 Volt DC, Bolt Mount
  • Littelfuse JLLN300 Powr-Gard® Fast-Acting Fuse; Class T, 300 Amp, 300 Volt AC, 125 Volt DC, Bolt Mount
Manufacturer: Littelfuse
Mfr. #: JLLN300
Item #: 174806
UPC: 079458180916
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Product Details

Size: 2-3/4 Inch Length x 1 Inch Width

Extremely current-limiting

200 Kilo-Amp interrupting rating

Variable speed drive protection

Detailed Description: Littelfuse Powr-Gard® JLLN Series Class T Fuse is uniquely designed for variable speed drives, rectifiers and other surge-sensitive equipments. Compact fuse provides reliable fast-acting overload and short-circuit protection with dependable current limiting. It measures 2-3/4 Inch x 1 Inch. It is rated at 300/125 VAC/VDC, 300 Amps. Cartridge blade fuse must be boosted to prevent nuisance opening on inflow currents. Economical power fuse can be easily mounted on a holder. Fast blow fuse has knife blade termination style. Class T fuse is UL and CSA approved.

Product Specification

Amperage Rating 300
Application Variable Speed Drives
Brand Littelfuse
Catalog Description JLLN UL CLASS T FAST-ACTING FUSE 300A. Space saving POWR-GARD Class T fuses are the most compact fuses available in ratings above 30 amperes ù 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-PROÖ 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 ôseries ratedö with Littelfuse Class T fuses. Refer to panelboard manufacturersÆ 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 50percent 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. ù Reliable interruption of all overcurrents up to 200,000 amperes. Extremely current limiting ù Stops damaging short circuit current faster than any mechanical protective device. Fast-Acting ù 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 JLLN/JLLS fuses may prevent opening of expensive semiconductor fuses protecting individual components.


Height 3.0000
Height Unit IN
Item Status A
Length 2.0000
Length UOM IN
Mfr. # JLLN300
Special Features Current-limiting
Standard UL Listed CSA Certified
Type Class T
UNSPSC 39121627
Voltage Rating 300
Width 1.0000
Width UOM IN