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Westinghouse HNB3900 - Molded Case 900A 3-Pole 600V

Westinghouse
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Westinghouse HNB3900 is a 3-pole molded case circuit breaker designed for overcurrent protection in industrial and commercial power distribution systems. It is rated for 600V AC and 900A, with a thermal magnetic trip unit providing long-time and instantaneous protection functions. This bolt-on breaker weighs 61 lb and is part of the MARK 75 family within the HNB frame style. It carries an interrupting rating of 35kA at 480V AC and operates at 50-60Hz with a temperature rating of 40 degrees Celsius. The HNB3900 is suitable for main and feeder protection applications requiring reliable overcurrent interruption.

Key Features & Specifications
  • Manufacturer: Westinghouse
  • Type: Molded Case Circuit Breaker
  • Family: MARK 75
  • Frame Style: HNB
  • Poles: 3
  • Current Rating: 900 Amp
  • Voltage Rating: 600V AC
  • Protection: Thermal Magnetic
  • Trip Unit: Thermal Magnetic Interchangeable
  • Functions: LI - Long-Time and Instantaneous
  • Connection: Bolt-On
  • AIC Rating: 35kA at 480V
  • Phase: 3
  • Frequency: 50-60Hz
  • Temperature Rating: 40 Degrees Celsius
  • Weight: 61 lb