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Square D LA34400MC - Molded Case Breaker 400A 3-Pole

Square D
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Square D LA34400MC is a 3-pole, 400A molded case circuit breaker from the I-Line family, designed to provide thermal magnetic protection for commercial and industrial power distribution systems. It operates at a voltage rating of 600V with a 30kA interrupt rating at 480V, utilizing LI (Long-Time and Instantaneous) trip functions for reliable overcurrent protection. The unit features an I-Line style plug-in connection, measures 11 inches in height, 4.44 inches in width, and 3.09 inches in depth, with a weight of 18.08 lb. This breaker is UL Listed and CSA Certified, ensuring compliance with industry safety standards for mission critical loads. It is suitable for use in panelboards and switchboards requiring a 3-phase, 400A thermal magnetic molded case breaker.

Key Features & Specifications
  • Manufacturer: Schneider Electric
  • Item Subcategory: Molded Case
  • Family: I-Line
  • Country of Origin: Mexico
  • Type: LA
  • Dimensions: Height 11 in (279.40 mm) x Depth 3.09 in (78.49 mm) x Width 4.44 in (112.78 mm)
  • Weight: 18.08 lb
  • Functions: LI - Long-Time and Instantaneous
  • Voltage Rating: 600V
  • Poles: 3
  • Connection: I-Line Style Plug-In
  • Protection: Thermal Magnetic
  • AIC rating: 30kA@480V
  • Phase: 3
  • Current Rating: 400A
  • Amperage: 400A
  • Voltage: 480V AC
  • Mounting Type: Plug-In
  • Interrupt Rating: 30kAIC @ 480V
  • Series/Frame: I-Line
  • Frame Amps: 400
  • Trip Unit: Thermal Magnetic
  • Certifications: UL Listed, CSA Certified
  • Application: Mission Critical Loads


Part Number: LA34400MC