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Square D MA263501121 - Molded Case Circuit Breaker 350A 600V

Square D
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The Square D MA263501121 is a 2-pole molded case circuit breaker from the I-Line family, designed for thermal-magnetic protection in industrial power distribution systems. It is rated for 600VAC, 350A continuous current, with a 30kA interrupting capacity at 480VAC for reliable fault interruption. This unit features an M Frame size, LI (Long-Time and Instantaneous) trip functions, and an I-Line style plug-in connection for secure busbar mounting in Square D panelboards. The breaker weighs 38 lb and is constructed for single-phase applications, providing coordinated overcurrent and short-circuit protection. It is commonly used in commercial and industrial facilities for branch circuit or feeder protection in switchboards and distribution panels.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, I-Line Family, MA Series
  • Voltage Rating: 600VAC
  • Current Rating: 350A
  • Poles: 2
  • Connection: I-Line Style Plug-In
  • Protection: Thermal Magnetic
  • AIC Rating: 30kA@480V
  • Phase: 1
  • Functions: LI - Long-Time and Instantaneous
  • Frame Size: M Frame
  • Weight: 38 lb