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Square D LJP36400U31X - Molded Case Circuit Breaker 400A 600V

Square D
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The Square D LJP36400U31X is a Powerpact L-frame molded case circuit breaker designed to provide reliable overcurrent and short-circuit protection for three-phase industrial power distribution systems. It features a solid-state trip unit with long-time and instantaneous (LI) protection functions, rated for 400A at 600V AC with an interrupting capacity of 65kA at 480V. The compact, bolt-on unit measures 340 mm H x 140 mm W x 110 mm D, weighs 15.82 lb, and is constructed for operation in temperatures from -25 to 70 °C. It complies with UL, CSA, NEMA, NOM, and IEC 60947-2 standards, ensuring suitability for a wide range of commercial and industrial panelboard and switchboard applications where robust protection and compliance are critical.

Key Features & Specifications
  • Type: Powerpact L-frame, Molded Case, Solid-State Trip Unit (LI)
  • Voltage Rating: 600V AC
  • Current Rating: 400A
  • Dimensions: 13.4 in H x 5.5 in W x 4.3 in D (340 mm x 140 mm x 110 mm)
  • Weight: 15.82 lb
  • Standards: UL, CSA, NEMA, NOM-003-SCFI-2000, IEC 60947-2
  • Certification: UL, CSA, NOM
  • Applications: Industrial Power Distribution, Panelboards, Switchboards
  • Configuration: 3-Pole, Bolt-On Connection
  • Temp Rating: -25°C to 70°C (-13°F to 158°F)
  • Phase: 3
  • AIC Rating: 65kA @ 480V
  • Connection: Bolt-On, Lug/Terminal Nut
  • Poles: 3
  • Protection: Solid State
  • Functions: Long-Time & Instantaneous (LI)
  • Frame Size: L
  • Terminal Connection: Lug, Terminal Nut
  • Wire Size: Accepts 2 conductors, 2/0 AWG to 500 kcmil (Cu/Al)
  • MCM Size: Min. 2/0 AWG, Max. 500 kcmil
  • Country of Origin: Mexico


Product Identification
  • UPC: 785901092988
  • GTIN: 00785901092988