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Square D LRA36400U31X - Molded Case Circuit Breaker 400A 600V 3P

Square D
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Square D LRA36400U31X is a molded case circuit breaker designed for providing robust overcurrent and short-circuit protection in demanding 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 (HxWxD) and weighing 14 lb. This solid-state trip unit breaker offers long-time and instantaneous trip functions, is certified to UL, CSA, and NOM standards, and complies with IEC 60947-2 for reliable operation in environments from -25°C to 70°C. Its I-Line style plug-in connection and 200kA interrupting capacity at 480V make it suitable for main feeder and branch circuit protection in industrial panels and switchboards.

Key Features & Specifications
  • Type: LRA Molded Case Circuit Breaker with 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) (HxWxD)
  • Standards: UL, CSA, NEMA, NOM-003-SCFI-2000, IEC 60947-2
  • Applications: Industrial Power Distribution, Main Feeders, Branch Circuits
  • Switch Type: Circuit Breaker
  • Configuration: Plug-In
  • Temp Rating: -13–158 °F (-25–70 °C)
  • Phase: 3
  • AIC Rating: 200kA @ 480V
  • Connection: I-Line Style Plug-In
  • Poles: 3
  • Protection: Solid State Trip Unit
  • Functions: Long Time and Instantaneous Trip
  • Frame Size: L Frame
  • Trip Type: Solid State
  • Breaker Type: Molded Case
  • Wire Size: AWG 3/0...500 kcmil (aluminium/copper)
  • Certification: UL, CSA, NOM
  • Family: Powerpact
  • Country of Origin: Mexico


Product Identification
  • UPC: 785901702672
  • GTIN: 00785901702672