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Westinghouse NB3300P - Molded Case Breaker 300A 600V 3-Pole

Westinghouse
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Westinghouse NB3300P is a 3-pole molded-case circuit breaker from the TRI-PAC family, designed for overcurrent protection in industrial and commercial power distribution systems. It is rated for 300A at 600V AC with a 200kA interrupting capacity at 600V, utilizing thermal-magnetic protection with LI (long-time and instantaneous) functions. The NB frame breaker weighs 85 lb and features a feed-thru connection configuration. It is designed for use in low-voltage distribution applications requiring reliable coordination and fault isolation.

Key Features & Specifications
  • Manufacturer: Westinghouse
  • Item Subcategory: Molded Case
  • Family: TRI-PAC
  • Type: NB
  • Weight: 85 lb
  • Functions: LI - Long-Time and Instantaneous
  • Voltage Rating: 600V
  • Poles: 3
  • Connection: Feed-Thru
  • Protection: Thermal Magnetic
  • AIC rating: 200kA@600V
  • Phase: 3
  • Current Rating: 300A
  • Amperage Rating: 300A at 40 degrees Celsius
  • Trip Unit: Long Delay and Magnetic Non-Interchangeable
  • Configuration: Tri-Pac Molded-Case