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Square D MA265001121 - Molded Case Circuit Breaker 500A 600V

Square D
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Square D MA265001121 is a 2-pole I-Line style plug-in molded case circuit breaker from the I-Line family, designed for thermal-magnetic protection with LI (Long-Time and Instantaneous) trip functions in industrial and commercial power distribution systems. Rated at 500A continuous current and 600V, it delivers a 30kA interrupting capacity at 480V for reliable fault clearing. Weighing 38 lb, this M Frame breaker features a compact, plug-in connection for direct mounting in Square D I-Line panelboards and switchgear. It complies with UL and NEMA standards for overcurrent protection in branch circuits and feeders. Typical applications include main or feeder protection in manufacturing plants, data centers, and large commercial facilities requiring high-amperage, low-voltage circuit isolation.

Key Features & Specifications
  • Type: Molded Case
  • Family: I-Line
  • Type: MA
  • Weight: 38 lb
  • 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: 500A


Part Number: MA265001121