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Square D LJM36400U31X - Molded Case 400A 600V (3-Pole)

Square D
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Square D LJM36400U31X is a Powerpact L Series molded case circuit breaker designed for overcurrent protection in commercial and industrial power distribution systems. It provides solid-state LI (Long Time and Instantaneous) protection with a 400A current rating and a 600VAC voltage rating, featuring a 65kA interrupting capacity at 480V. This three-pole, three-phase unit measures 13.4 in (340 mm) by 5.5 in (140 mm) by 4.3 in (110 mm), weighs 15 lb, and uses a bolt-on connection with lugs for 2 x AWG 2/0 to 500 kcmil aluminum or copper wire. It complies with UL, CSA, NEMA, NOM-003-SCFI-2000, and IEC 60947-2 standards, and is certified by UL, CSA, and NOM. Typical applications include main and feeder circuit protection in switchboards, panelboards, and industrial control panels.

Key Features & Specifications
  • Type: Molded Case
  • Family: Powerpact
  • Frame Size: L Frame
  • Current Rating: 400A
  • Voltage Rating: 600V
  • Poles: 3
  • Phase: 3
  • Interrupt Rating: 65kA@480V
  • Protection: Solid State
  • Functions: LI - Long Time and Instantaneous
  • Connection: Bolt-On
  • Wire Size: 2 x AWG 2/0...500 kcmil aluminium/copper
  • Dimensions: 13.4 in (340 mm) x 5.5 in (140 mm) x 4.3 in (110 mm) (Height x Width x Depth)
  • Weight: 15 lb
  • Temp Rating: 28-158 °F (-2-70 °C)
  • Standards: UL, CSA, NEMA, NOM-003-SCFI-2000, IEC 60947-2
  • Certification: UL, CSA, NOM
  • Country of Origin: Mexico


Product Identification
  • UPC: 785901079019
  • GTIN: 00785901079019