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Square D LGA36400U33X - Molded Case Circuit Breaker 400A 600V

Square D
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Square D LGA36400U33X is a molded case circuit breaker designed for providing comprehensive solid-state 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 19.16 lb. This 100% rated breaker complies with UL, CSA, NEMA, NOM, and IEC 60947-2 standards, ensuring reliable operation in temperatures from -2°C to 70°C. Its I-Line style plug-in connection and LSI (Long-Time, Short-Time, Instantaneous) trip functions make it suitable for protecting feeders and mains in panelboards and switchboards, offering a 35kA interrupting capacity at 480V and accepting wire sizes from 3/0 AWG to 500 kcmil for both copper and aluminum conductors.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Solid State Protection, LSI Trip Functions
  • 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
  • Weight: 19.16 lb
  • Standards: UL, CSA, NEMA, NOM-003-SCFI-2000, IEC 60947-2
  • Applications: Industrial Power Distribution, Feeder & Main Protection
  • Switch Type: Circuit Breaker
  • Configuration: Plug-In
  • Phase: 3
  • Poles: 3
  • Connection: I-Line Style Plug-In, Lug Terminals
  • Protection: Solid State
  • Functions: Long-Time, Short-Time, Instantaneous (LSI)
  • Frame Size: L Frame
  • Breaker Type: 100% Rated
  • AIC rating: 35kA @ 480V
  • Temp Rating: -2°C to 70°C (28°F to 158°F)
  • Wire Size: 3/0 AWG to 500 kcmil (Cu/Al)
  • MCM Size: Min. 3/0 AWG, Max. 500 kcmil
  • Certification: UL, CSA, NOM
  • Phase Connection: ABC
  • Terminal Connection: I-Line, Lug
  • Family: Powerpact
  • Country of Origin: Mexico


Product Identification
  • UPC: 785901809289
  • GTIN: 00785901809289