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Westinghouse NB3400PT - 400A Thermal Magnetic Circuit Breaker

Westinghouse
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Westinghouse NB3400PT is a 3-pole thermal magnetic circuit breaker designed for providing reliable overcurrent protection in industrial power distribution systems. It features a 600V AC voltage rating and a fixed 400A current rating within its 400-frame size, housed in a compact unit measuring 5.5" D x 8.25" H x 8.25" W and weighing 4 lb. The breaker is UL 489 certified and utilizes a Long-time and Instantaneous (LI) trip function for coordinated protection against both sustained overloads and short-circuit faults. It is engineered for integration into compatible NB-frame panelboards and switchboards for commercial and industrial applications.

Key Features & Specifications
  • Type: Thermal Magnetic Circuit Breaker, NB Type, Fixed Mount
  • Voltage Rating: 600V AC
  • Current Rating: 400A
  • Dimensions: 5.5 in (Depth) x 8.25 in (Height) x 8.25 in (Width)
  • Standards: UL 489
  • Applications: Industrial Power Distribution, Panelboards, Switchboards
  • Switch Type: Circuit Breaker
  • Configuration: Fixed
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: Long-Time and Instantaneous (LI)
  • Frame Size: 400
  • Trip Type: Thermal Magnetic
  • Breaker Type: Molded Case
  • Amperage Maximum: 400A
  • Amperage Minimum: 400A
  • Compatible Frames: NB
  • Family: TRI-PAC
  • Country of Origin: United States
  • Weight: 4 lb


Product Identification
  • UPC: 786679766569
  • GTIN: 00786679766569