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Westinghouse MA3300S - Molded Case Circuit Breaker 300A 600V 3-Pole

Westinghouse
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Westinghouse MA3300S is a 300A, 600V, 3-pole molded case circuit breaker from the MA Series, designed for overcurrent protection in industrial power distribution systems. It utilizes a thermal magnetic trip unit with LI (Long-Time and Instantaneous) protection functions to safeguard electrical circuits from sustained overloads and short circuits. The unit weighs 54 lb, features a bolt-on connection, and is configured for 3-phase applications with an AIC rating of 30kA at 480V. This breaker is UL Listed, ensuring compliance with rigorous safety and performance standards for demanding environments. It is suitable for panel mount installations in industrial settings, providing reliable circuit protection with load side lug terminals for flexible wiring options.

Key Features & Specifications
  • Manufacturer: Westinghouse
  • Item Subcategory: Molded Case
  • Family: MA Series
  • Type: MA
  • Weight: 54 lb
  • Functions: LI - Long-Time and Instantaneous
  • Voltage Rating: 600V
  • Poles: 3
  • Connection: Bolt-On
  • Protection: Thermal Magnetic
  • AIC rating: 30kA@480V
  • Phase: 3
  • Current Rating: 300A
  • Mounting Type: Panel Mount
  • Interrupt Rating: 35kA @ 480V
  • Trip Unit: Thermal Magnetic, Interchangeable
  • Terminals: Load Side Lug
  • Protection Functions: Long Time, Short Time, Instantaneous
  • Certification: UL Listed