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Square D MJA263002 - Molded Case Circuit Breaker 300A 600V

Square D
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Square D MJA263002 is a molded case circuit breaker designed for providing reliable overcurrent protection in industrial power distribution systems. It features a 300A current rating and a 600V voltage rating, housed within a compact M-frame design measuring 326.64 mm H x 210.06 mm W x 204.47 mm D and weighing 28.001 lb. The breaker complies with UL, CSA, NEMA, NOM, and IEC 60947-2 standards and utilizes solid-state protection with Long-Time and Instantaneous (LI) trip functions for precise coordination. Its I-Line style plug-in connection and ability to handle wire sizes from 3/0 AWG to 500 kcmil make it suitable for a wide range of commercial and industrial panelboard applications.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Solid State Protection, I-Line Style Plug-In
  • Voltage Rating: 600V AC
  • Current Rating: 300A
  • Dimensions: 326.64 mm H x 210.06 mm W x 204.47 mm D (12.86 in x 8.27 in x 8.05 in)
  • Standards: UL, CSA, NEMA, NOM-003-SCFI-2000, IEC 60947-2
  • Applications: Industrial Power Distribution, Panelboards
  • Switch Type: Circuit Breaker
  • Configuration: Plug-In
  • Temp Rating: -25 to 70 °C (-13 to 158 °F)
  • Phase: 1
  • AIC Rating: 65kA at 480V
  • Connection: I-Line Style
  • Poles: 2
  • Protection: Solid State
  • Functions: Long-Time and Instantaneous (LI)
  • Frame Size: M Frame
  • Trip Type: Solid State
  • Wire Size: 3 x AWG 3/0 to 3 x 500 kcmil (Aluminium/Copper)
  • Certification: UL, CSA, NOM
  • Family: Powerpact
  • Country of Origin: United States


Product Identification
  • UPC: 078590150767
  • GTIN: 00785901507673