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Littelfuse JLLN400 400 Amp 300 VAC 125 VDC Class T Fast Acting Fuse

Manufacturer: Littelfuse | Catalog # JLLN400 | Codale Part # 3537082
$144.30/ea
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Prop 65 Warning Prop 65 Warning Primary Spec Sheet
Space saving POWR-GARD 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.

Technical Information

Amperage
400 Amp
Applications
Variable Speed Drives
Interrupt Rating
200 kAIC
Response Time
Blade
Size
2.75L; 1.31D inches
Type
Class T
Voltage
125 Volt

Manufacturer Information

Brand
Littelfuse
Sub Brand
POWR-GARD JLLN Series

General Product Info

12-Digit UPC
079458180930
Product UPC
07945818093
Weight
0.2500 lb

Certifications & Compliance

Prop 65 Warning
WARNING: This product can expose you to chemicals including nickel, which is known to the State of California to cause cancer.
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 JLLN/JLLS fuses may prevent opening of expensive semiconductor fuses protecting individual components.
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