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Square D Q4L3400 - 400A Molded Case Circuit Breaker (25kA AIC, 3-Pole)

Square D
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The Square D Q4L3400 is a 400A molded case circuit breaker designed to provide reliable thermal-magnetic protection for three-phase industrial power distribution systems. It features a 240V AC voltage rating and a 25kA interrupting capacity at that voltage, housed in a compact 400A frame with dimensions of 279.4 mm H x 152.4 mm W x 148.34 mm D and a weight of 16.38 lb. This breaker is constructed with bolt-on lug connections, supports wire sizes from 1/0 AWG to 600 MCM, and operates within a temperature range of -25 to 70 °C. It complies with CSA, IEC, and UL standards, making it suitable for installation in panelboards, switchboards, motor control centers, industrial enclosures, combination starters, and busway plug-in units.

Key Features & Specifications
  • Type: Q4L Series Molded Case Circuit Breaker, Standard, Thermal Magnetic Protection
  • Voltage Rating: 240V AC
  • Current Rating: 400A
  • Frame Size: 400A/Q4
  • Poles: 3
  • AIC Rating: 25kA @ 240V
  • Connection: Bolt-On, Lug Terminal
  • Phase Connection: ABC, 3-Phase
  • Functions: Long Time and Instantaneous Trip
  • Dimensions: 279.4 mm H x 152.4 mm W x 148.34 mm D (11 in x 6 in x 5.84 in)
  • Weight: 16.38 lb
  • MCM/Wire Size: Minimum 1/0 AWG, Maximum 250 MCM, 600 MCM
  • Temp Rating: -25 to 70 °C (-13 to 158 °F)
  • Standards & Certification: CSA, IEC, UL Listed
  • Panel Type: Busway Plug-In Units, Combination Starters, Industrial Enclosures, Motor Control Centers, Panelboards, Switchboards
  • Protection: Thermal Magnetic
  • Breaker Type: Standard
  • Family: Q4L Series
  • Country of Origin: Mexico


Product Identification
  • UPC: 785901649281
  • GTIN: 00785901649281