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Cutler Hammer HNB31000T - 1000A 3P Thermal-Magnetic Breaker

Cutler Hammer
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The Westinghouse Cutler Hammer HNB31000T is a three-pole, thermal-magnetic circuit breaker designed to provide reliable overcurrent and short-circuit protection for industrial power distribution systems. It is rated for 600V AC applications with a fixed current rating of 1000A, featuring an LI (Long-time and Instantaneous) trip function for coordinated system protection. The unit is constructed with a durable HNB frame, measures 10.5" x 7" x 5.4" (L x H x W), and weighs 5.1 lb, ensuring robust performance in demanding environments. It is UL Listed and designed for compatibility with NB, HNB, and NBY breaker frames, making it a standard component for industrial panelboards and switchgear where consistent protection and compliance are critical.

Key Features & Specifications
  • Type: HNB Frame, Thermal-Magnetic Circuit Breaker
  • Voltage Rating: 600V AC
  • Current Rating: 1000A Fixed
  • Dimensions: 10.5 in x 7 in x 5.4 in (Length x Height x Width)
  • Weight: 5.1 lb
  • Standards: UL Listed
  • Functions: LI - Long-Time and Instantaneous Trip
  • Protection: Thermal-Magnetic
  • Poles: 3
  • Compatible Frames: NB, HNB, NBY
  • Family: MARK 75
  • Country of Origin: United States


Product Identification
  • UPC: 786679192160
  • GTIN: 00786679192160