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Square D MA264001021 - Molded Case 400A 600V 2-Pole

Square D
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Square D MA264001021 is a 2-pole I-Line style plug-in molded case circuit breaker from the I-Line family, designed for overcurrent protection in industrial and commercial power distribution systems. It is rated for 400A at 600VAC, providing LI (Long-Time and Instantaneous) thermal-magnetic protection with a 30kA interrupting capacity at 480V. Weighing 38 lb, this M Frame breaker features a compact construction for panel mounting and is equipped with a 120V shunt trip for remote tripping capability. It complies with UL and CSA standards for reliable performance in demanding environments. Typical applications include branch circuit protection in switchboards, panelboards, and motor control centers.

Key Features & Specifications
  • Type: Molded Case
  • Family: I-Line
  • Type: MA
  • Functions: LI - Long-Time and Instantaneous
  • Frame Size: M Frame
  • Voltage Rating: 600V
  • Poles: 2
  • Connection: I-Line Style Plug-In
  • Protection: Thermal Magnetic
  • AIC rating: 30kA@480V
  • Phase: 1
  • Current Rating: 400A
  • Additional Info: complete with 120V shunt trip
  • Weight: 38 lb
  • Interrupt Rating: 42 kA at 240 VAC, 30 kA at 480 VAC
  • Mounting Type: Panel Mount
  • Certifications: UL Listed, CSA Certified


MA264001021