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Square D LGL36400U31X - Molded Case Circuit Breaker 400A 600V

Square D
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Square D LGL36400U31X 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 measuring 340 mm x 140 mm x 110 mm (H x W x D) and weighing 17.09 lb. This solid-state protection device with LI (Long-time and Instantaneous) trip functions is certified to UL, CSA, NOM, and IEC 60947-2 standards, ensuring compliance for robust industrial applications. Its feed-thru lug connection accommodates wire sizes from 2/0 AWG to 500 kcmil for both copper and aluminum conductors, making it suitable for main feeder and branch circuit protection in commercial and industrial facilities.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, LGL Type, Solid State Protection
  • 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, Main Feeder & Branch Circuit Protection
  • Switch Type: Circuit Breaker
  • Configuration: Fixed
  • Phase: 3
  • Poles: 3
  • AIC Rating: 35kA @ 480V
  • Connection: Feed-Thru
  • Terminal Connection: Lug
  • Protection: Overcurrent
  • Functions: LI (Long-Time and Instantaneous)
  • Frame Size: L Frame
  • Trip Type: Solid State
  • Temp Rating: -2 to 70 °C (28 to 158 °F)
  • Wire Size: 2 x AWG 2/0 to 500 kcmil (Copper/Aluminum)
  • MCM Size: Min. 2/0 AWG, Max. 500 kcmil
  • Certification: UL, CSA, NOM
  • Family: Powerpact
  • Weight: 17.09 lb


Product Identification
  • UPC: 78590163760
  • GTIN: 00785901637608