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Square D Q4L3300 - Molded Case Circuit Breaker 300A 3P (25kA AIC)

Square D
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Square D Q4L3300 is a molded case circuit breaker designed for providing reliable overcurrent and short-circuit protection in demanding three-phase industrial power systems. It features a 300A current rating and a 240V voltage rating, housed within a robust 400A frame with compact dimensions of 279.4 mm H x 152.4 mm W x 148.34 mm D and a weight of 16.29 lb. This thermal magnetic breaker is CSA, IEC, and UL Listed, ensuring compliance with key industry standards for safety and performance. Its typical applications include integration into panelboards, switchboards, motor control centers, industrial enclosures, combination starters, and busway plug-in units.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Standard, Thermal Magnetic Protection with Long Time and Instantaneous Trip Functions
  • Voltage Rating: 240V AC
  • Current Rating: 300A
  • Frame Size: 400A/Q4
  • AIC Rating: 25kA @ 240V
  • Poles: 3
  • Phase: 3
  • Connection: Bolt-On, Lug Terminal
  • MCM/Wire Size: Minimum 1/0 AWG, Maximum 250/600 MCM
  • Dimensions: 279.4 mm H x 152.4 mm W x 148.34 mm D (11 in x 6 in x 5.84 in)
  • Weight: 16.29 lb
  • Operating Temperature: -25°C to 70°C (-13°F to 158°F)
  • Standards & Certification: CSA, IEC, UL Listed
  • Panel Type: Compatible with Busway Plug-In Units, Combination Starters, Industrial Enclosures, Motor Control Centers, Panelboards, Switchboards
  • Phase Connection: ABC


Product Identification
  • UPC: 785901649267
  • GTIN: 00785901649267
  • Family: Q4L Series
  • Country of Origin: Mexico