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Square D MAB36300 - Molded Case 300A 600V

Square D
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Square D MAB36300 is a 300A, 3-pole molded case circuit breaker from the I-Line family, designed for overcurrent protection in commercial and industrial power distribution systems. It operates at a voltage rating of 600V AC with a current rating of 300A, providing LI (Long-Time and Instantaneous) protection through a thermal magnetic mechanism. The unit features an M Frame construction, weighs 38 lb, and utilizes an I-Line style plug-in connection for secure installation. It is UL 489 listed and carries an AIC rating of 30kA at 480V, with additional interrupting capacities of 18kA at 600V, 35kA at 480V, and 65kA at 240V. This circuit breaker is suitable for 3-phase applications in switchboards, panelboards, and motor control centers requiring reliable branch circuit protection.

Key Features & Specifications
  • Type: MAB
  • Item Subcategory: Molded Case
  • Family: I-Line
  • Functions: LI - Long-Time and Instantaneous
  • Frame Size: M Frame
  • Voltage Rating: 600V
  • Poles: 3
  • Connection: I-Line Style Plug-In
  • Protection: Thermal Magnetic
  • AIC rating: 30kA@480V
  • Phase: 3
  • Current Rating: 300A
  • Weight: 38 lb
  • Interrupt Rating: 18kA @ 600V
  • Interrupt Rating: 35kA @ 480V
  • Interrupt Rating: 65kA @ 240V
  • UL Listed: UL 489
  • Application: Molded Case Circuit Breaker
  • Mounting Type: Unit Mount / I-Line Style Plug-In


Part Number: MAB36300