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Square D LJL36400U31X - 400A Molded Case Breaker (65kA AIC)

Square D
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The Square D LJL36400U31X is a Powerpact L-frame molded case circuit breaker designed to provide reliable overcurrent and short-circuit protection for industrial power distribution systems. It features a 400A current rating and a 600V AC voltage rating, housed in a compact, rugged enclosure measuring 340 mm H x 140 mm W x 110 mm D and weighing 17.249 lb. This three-pole, feed-thru breaker utilizes solid-state protection with long-time and instantaneous trip functions and is certified to UL, CSA, NOM, and IEC 60947-2 standards. It is engineered for demanding applications such as panelboards, switchboards, and motor control centers, offering a 65kA interrupting capacity at 480V and an operational temperature range of -2°C to 70°C.

Key Features & Specifications
  • Type: Powerpact L-Frame Molded Case Circuit Breaker, Solid State Protection
  • Voltage Rating: 600V AC
  • Current Rating: 400A
  • Dimensions: 13.4 in (340 mm) H x 5.5 in (140 mm) W x 4.3 in (110 mm) D
  • Standards: UL, CSA, NEMA, NOM-003-SCFI-2000, IEC 60947-2
  • Applications: Industrial Power Distribution, Panelboards, Switchboards, Motor Control Centers
  • Switch Type: Circuit Breaker
  • Configuration: Feed-Thru
  • Temp Rating: -2°C to 70°C (28°F to 158°F)
  • Phase: 3
  • AIC Rating: 65kA @ 480V
  • Connection: Lug Terminal
  • Poles: 3
  • Protection: Solid State
  • Functions: Long Time and Instantaneous Trip
  • Frame Size: L Frame
  • Wire Size: 2 x AWG 2/0 to 500 kcmil (Aluminium/Copper)
  • Certification: UL, CSA, NOM
  • MCM Size: Min. 2/0 AWG, Max. 500 kcmil
  • Weight: 17.249 lb


Product Identification
  • UPC: 785901132769
  • GTIN: 00785901132769