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Square D MA266001121 - Molded Case Circuit Breaker 600A 600V

Square D
Price
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Square D MA266001121 is a 2-pole molded case circuit breaker from the I-Line family, designed for overload and short-circuit protection in industrial and commercial power distribution systems. It is rated for 600V and 600A, utilizing thermal-magnetic trip technology with LI (Long-Time and Instantaneous) functions to provide reliable circuit protection. The unit weighs 38 lb and features an M Frame construction with an I-Line style plug-in connection for secure installation in compatible panelboards. It carries an AIC rating of 30kA at 480V and is UL Listed and CSA Certified for compliance with industry safety standards. This 1-phase breaker is typically applied in main switchboards, distribution panels, and heavy-load feeder circuits requiring robust coordination and manual disconnect capability.

Key Features & Specifications
  • Manufacturer: Square D
  • Item Subcategory: 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: 600A
  • Breaker Type: Molded Case Circuit Breaker
  • Manual Operation: Yes
  • UL Listed
  • CSA Certified


MA266001121