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Square D LDA36400U31X - 400A Molded Case Breaker (600V, 3-Pole)

Square D
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The Square D LDA36400U31X is a Powerpact L-Frame molded case circuit breaker designed to provide reliable overcurrent protection for industrial power distribution systems. It features a solid-state LI (Long-time and Instantaneous) trip unit with a 400A current rating and a 600V AC voltage rating, housed in a compact, robust enclosure measuring 340 mm H x 140 mm W x 110 mm D and weighing 18.77 lb. This three-pole, plug-in I-Line style breaker is certified to UL, CSA, NOM, and IEC 60947-2 standards, ensuring compliance with major North American and international safety requirements. Its 18kA interrupting capacity at 480V and compatibility with conductors from AWG 3/0 to 500 kcmil make it suitable for protecting feeders and branch circuits in commercial and industrial facilities, operating effectively within an ambient temperature range of -2°C to 70°C.

Key Features & Specifications
  • Type: Powerpact L-Frame Molded Case Circuit Breaker with Solid-State LI Trip Unit
  • 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: 18.77 lb
  • Standards: UL, CSA, NEMA, NOM-003-SCFI-2000, IEC 60947-2
  • Certification: UL, CSA, NOM
  • Phase: 3
  • Poles: 3
  • AIC Rating: 18kA @ 480V
  • Connection: I-Line Style Plug-In
  • Terminal Connection: I-Line, Lug
  • Wire Size: AWG 3/0 to 500 kcmil (Aluminium/Copper)
  • Frame Size: L Frame
  • Protection: Solid State
  • Functions: LI - Long-Time and Instantaneous
  • Temp Rating: 28-158 °F (-2-70 °C)
  • Family: Powerpact
  • Country of Origin: Mexico


Product Identification
  • UPC: 785901298632
  • GTIN: 00785901298632