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Square D LJA36400CU44X - Molded Case Circuit Breaker 400A 600V 3P

Square D
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Square D LJA36400CU44X is a molded case circuit breaker designed for providing comprehensive overcurrent and ground fault protection in industrial power distribution systems. It features a 400A current rating and a 600V AC voltage rating, housed within a compact L-frame measuring 340 mm H x 140 mm W x 110 mm D and weighing 17 lb. This 100% rated, 3-pole breaker utilizes a solid-state trip unit with long-time, short-time, instantaneous, and ground fault functions, and it complies with UL, CSA, NEMA, NOM, and IEC 60947-2 standards. Its I-Line style plug-in connection and lug terminals, compatible with 2/0 to 500 kcmil aluminum or copper wire, make it suitable for main feeder and branch circuit protection in commercial and industrial panels.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Solid State Trip Unit
  • Voltage Rating: 600V AC
  • Current Rating: 400A
  • Dimensions: 340 mm H x 140 mm W x 110 mm D (13.4 in x 5.5 in x 4.3 in)
  • Standards: UL, CSA, NEMA, NOM-003-SCFI-2000, IEC 60947-2
  • Applications: Industrial Power Distribution, Main Feeder & Branch Circuit Protection
  • Switch Type: Circuit Breaker
  • Configuration: 3-Pole
  • Connection: I-Line Style Plug-In, Lug Terminal
  • Protection: Overcurrent & Ground Fault
  • Functions: Long Time, Short Time, Instantaneous, Ground Fault Trip
  • Frame Size: L Frame
  • Breaker Type: 100% Rated
  • Phase: 3-Phase
  • AIC Rating: 65kA @ 480V
  • Temp Rating: -2°C to 70°C (28°F to 158°F)
  • Wire Size: 2 x AWG 2/0 to 500 kcmil (Aluminum/Copper)
  • Certification: UL, CSA, NOM
  • Terminal Connection: I-Line, Lug
  • Weight: 17 lb
  • Family: Powerpact
  • Country of Origin: United States


Product Identification
  • UPC: 785901809289
  • GTIN: 03606485955728