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Littelfuse KLLU4000 - RK1 Class Fuse 4000A 600V (200kA AIC)

Littelfuse
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Littelfuse KLLU4000 is a low-voltage current-limiting fuse designed for high-amperage circuit protection in industrial power distribution systems. It features a 4000A current rating and a 600V AC voltage rating, providing a 200kA interrupting capacity at that voltage. The fuse is constructed as a single-barrel, bolt-in unit with a 0.56-inch diameter and a weight of 24 lb, built to the RK1 time-delay classification. It complies with UL 248-10 and CSA standards for safety and performance. Typical applications include service entrance equipment, switchboards, and motor control centers where high fault current protection is critical.

Key Features & Specifications
  • Type: KLLU, Low Voltage, Current-Limiting, Time-Delay (RK1 Class), Single Barrel
  • Voltage Rating: 600V AC
  • Current Rating: 4000A
  • Dimensions: 0.56 in Diameter
  • Standards: UL 248-10 Listed, CSA Certified
  • Applications: Industrial Power Distribution, Service Entrance, Switchboards, Motor Control Centers
  • AIC rating: 200kA @ 600V AC
  • Connection: Bolt-In
  • Class Rating: RK1
  • Barrels: 1
  • Weight: 24 lb


Product Identification
  • UPC: 079458017472
  • GTIN: 00079458017472