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Square D MA26400 - Molded Case Circuit Breaker 400A 600V 2-Pole

Square D
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Square D MA26400 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 600V AC voltage rating, housed within a compact M-Frame design with a plug-in I-Line connection for simplified installation. This thermal-magnetic breaker offers LI (Long-time and Instantaneous) protection functions and is rated for 30kA interrupting capacity at 480V, ensuring compliance with rigorous industry standards for safety and performance. Its two-pole, single-phase configuration makes it suitable for protecting feeders and branch circuits in commercial and industrial panelboards.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal-Magnetic Protection, I-Line Family
  • Voltage Rating: 600V AC
  • Current Rating: 400A
  • Frame Size: M Frame
  • Poles: 2
  • Phase: 1
  • Connection: I-Line Style Plug-In
  • Protection Functions: LI (Long-Time and Instantaneous)
  • AIC Rating: 30kA @ 480V
  • Weight: 38 lb