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Square D Q422400AC - Molded Case Circuit Breaker 400A 240V 2-Pole

Square D
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Square D Q422400AC is a molded case circuit breaker designed for providing reliable overcurrent protection in industrial power distribution systems. It features a 400A current rating and a 240V AC voltage rating for single-phase applications, housed in a compact unit measuring 279.4 mm H x 152.4 mm W x 148.34 mm D and weighing 4 lb. The breaker is certified to IEC, UL, and CSA standards and utilizes a thermal-magnetic protection mechanism with long-time and instantaneous (LI) trip functions for coordinated system protection. Its I-Line style plug-in connection facilitates installation in compatible panelboards, making it suitable for protecting feeders and branch circuits powering heavy machinery and large equipment loads.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Q4 Type, Thermal-Magnetic Protection with Long-Time and Instantaneous (LI) Trip Functions
  • Voltage Rating: 240V AC
  • Current Rating: 400A
  • Dimensions: 11 in (279.4 mm) H x 6 in (152.4 mm) W x 5.84 in (148.34 mm) D
  • Standards: IEC-UL LISTED-CSA
  • Applications: Industrial power distribution for feeders and branch circuits
  • Switch Type: Circuit Breaker
  • Configuration: Plug-In
  • Phase: 1
  • Voltage: 240V
  • Amperage: 400A
  • AIC Rating: 25kA @ 240V
  • Connection: I-Line Style Plug-In
  • Poles: 2
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous
  • Wire Size: Accepts AWG 1, 600 kcmil Aluminium and AWG 1, 250 kcmil Aluminium conductors
  • Family: I-Line
  • Item Subcategory: Molded Case
  • Weight: 4 lb


Product Identification
  • UPC: 785901649342
  • GTIN: 00785901649342