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

Westinghouse
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Westinghouse HNB3900 is a 3-pole molded case circuit breaker from the MARK 75 family, designed for overcurrent protection in industrial power distribution systems. It is rated for 900A at 600V AC, with a 35kA interrupting capacity at 480V, and utilizes thermal-magnetic protection with LI (Long-Time and Instantaneous) trip functions. The unit features a bolt-on connection, weighs 61 lb, and is built for 3-phase applications. It complies with industry standards for molded case circuit breakers, making it suitable for protecting feeders and large branch circuits in manufacturing plants, commercial facilities, and heavy machinery installations.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, MARK 75 Family
  • Voltage Rating: 600V AC
  • Current Rating: 900A
  • Poles: 3
  • Connection: Bolt-On
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous
  • AIC Rating: 35kA@480V
  • Phase: 3
  • Weight: 61 lb
  • Standards: UL, CSA, NEMA compliant
  • Applications: Industrial power distribution, feeder protection, heavy machinery
  • Circuit Breaker Mounting Style: Bolt-On
  • Terminal Connection: Bolt-On
  • Frequency Rating: 60 Hz
  • Phase Connection: 3-Phase
  • Breaker Frame: MARK 75
  • Current Rating: 900A
  • Installation Type: Panelboard or Switchboard
  • Item QTY: 1


Product Identification
  • UPC: Not available
  • GTIN: Not available