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Westinghouse NB3900S - Molded Case Breaker 900A 600V

Westinghouse
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The Westinghouse NB3900S is a three-pole molded case circuit breaker designed for overcurrent protection in industrial power distribution systems. It provides a 900A current rating with a voltage rating of 600V, featuring a thermal magnetic trip mechanism for long-time and instantaneous protection. This bolt-on unit weighs 61 lb and is constructed for robust performance, with an AIC rating of 30kA at 480V. It complies with industry standards for molded case breakers and is suited for high-amperage applications in manufacturing, commercial, and utility environments.

Key Features & Specifications
  • Type: Molded Case, Thermal Magnetic
  • Voltage Rating: 600V
  • Current Rating: 900A
  • Poles: 3
  • Phase: 3
  • AIC Rating: 30kA@480V
  • Connection: Bolt-On
  • Protection: LI - Long-Time and Instantaneous
  • Weight: 61 lb
  • Family: NB Series


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