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Square D LGN36400U31X - Molded Case Breaker 400A 600V (35kA AIC)

Square D
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Square D LGN36400U31X is a molded case circuit breaker designed for providing reliable overcurrent protection in three-phase industrial power distribution systems. It features a 400A current rating and a 600V voltage rating, housed within a compact L-frame plug-in design measuring 340 mm x 140 mm x 110 mm (H x W x D) and weighing 15 lb. The breaker utilizes solid-state protection with Long-time and Instantaneous (LI) trip functions, ensuring compliance with UL, CSA, NEMA, NOM, and IEC 60947-2 standards. Its 35kA interrupting capacity at 480V and an operational temperature range of -2 to 70 °C make it suitable for demanding applications in manufacturing, data centers, and commercial facilities.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Solid-State Protection, L Frame
  • Voltage Rating: 600V AC
  • Current Rating: 400A
  • Dimensions: 13.4 in (340 mm) x 5.5 in (140 mm) x 4.3 in (110 mm) (H x W x D)
  • Standards: UL, CSA, NEMA, NOM-003-SCFI-2000, IEC 60947-2
  • Applications: Industrial power distribution, panelboards, switchgear
  • Switch Type: Circuit Breaker
  • Configuration: Plug-In
  • Temp Rating: 28-158 °F (-2-70 °C)
  • Phase: 3
  • Amperage: 400A
  • AIC rating: 35kA@480V
  • Connection: Plug-In
  • Poles: 3
  • Protection: Solid State
  • Functions: LI - Long-Time and Instantaneous
  • Frame Size: L Frame
  • Wire Size: 2 x AWG 2/0...500 kcmil aluminium/copper
  • Certification: UL, CSA, NOM
  • Family: Powerpact


Product Identification
  • UPC: 078590174059
  • GTIN: 00785901740599