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Square D MJL36300 - Molded Case Circuit Breaker 300A 600V 3P

Square D
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Square D MJL36300 is a molded case circuit breaker designed for providing reliable overcurrent protection in three-phase industrial power distribution systems. It features a solid-state trip unit for long-time and instantaneous protection, rated for 300A at 600V with an interrupting capacity of 65kA at 480V. The breaker is constructed with a robust 800A/M frame, measures 326.64 mm H x 210.06 mm W x 204.47 mm D, and utilizes box lug terminals for lug-in/lug-out connection of conductors from 3/0 AWG to 500 kcmil. It complies with UL, CSA, NEMA, NOM, and IEC 60947-2 standards and is engineered for a wide operating temperature range of -25 to 70 °C, making it suitable for integration into equipment gear and panelboards.

Key Features & Specifications
  • Type: Standard molded case circuit breaker with solid-state protection
  • Voltage Rating: 600V AC
  • Current Rating: 300A
  • Frame Size: 800A/M
  • Poles: 3
  • AIC Rating: 65kA @ 480V
  • Connection: Lug In/Lug Out with Box Lug terminals
  • Wire Size: 3 x AWG 3/0 to 3 x 500 kcmil (aluminium/copper)
  • Phase Connection: CBA
  • Functions: Long Time and Instantaneous Trip
  • Protection: Solid State
  • Panel Type: Equipment Gear
  • Breaker Type: Standard
  • Temp Rating: -25 to 70 °C (-13 to 158 °F)
  • 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)
  • Weight: 29 lb
  • Standards: UL, CSA, NEMA, NOM-003-SCFI-2000, IEC 60947-2
  • Certification: UL, CSA, NOM
  • Family: Powerpact
  • Country of Origin: Mexico


Product Identification
  • UPC: 785901879947
  • GTIN: 00785901507574