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Square D LGA36400U31X - Molded Case Circuit Breaker 400A 600V

Square D
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Square D LGA36400U31X is a molded case circuit breaker designed for providing robust 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 19.09 lb. This solid-state protection device offers long-time and instantaneous trip functions, is constructed for I-Line style plug-in connection with lug terminals, and complies with UL, CSA, NEMA, NOM, and IEC 60947-2 standards. It is engineered for demanding applications, supporting wire sizes from 3/0 AWG to 500 kcmil for both copper and aluminum conductors and providing a 35kA interrupting capacity at 480V AC.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Solid State Protection, I-Line Plug-In
  • 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
  • Switch Type: Circuit Breaker
  • Configuration: Plug-In
  • Temp Rating: -2 to 70 °C (28 to 158 °F)
  • Phase: 3
  • AIC Rating: 35kA @ 480V
  • Connection: I-Line, Lug
  • Poles: 3
  • Protection: Solid State
  • Functions: Long Time and Instantaneous Trip
  • Frame Size: L Frame
  • Trip Type: Thermal-Magnetic
  • Wire Size: 3/0 AWG to 500 kcmil (Cu/Al)
  • Certification: UL, CSA, NOM
  • Phase Connection: ABC
  • MCM Size: Min. 3/0 AWG, Max. 500 kcmil
  • Terminal Connection: Lug
  • Frequency Rating: 50/60 Hz
  • Compatible Frames: I-Line Panelboards
  • Installation Type: Plug-In Mount
  • Breaker Frame: L
  • Operating Temperature Maximum Celsius: 70 °C


Product Identification
  • UPC: 785901644972
  • GTIN: 00785901644972