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Westinghouse HNB3700T - Thermal Magnetic Trip Unit 700A 600V

Westinghouse
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Westinghouse HNB3700T is a thermal magnetic circuit breaker trip unit designed for overcurrent protection in industrial power distribution systems. This three-pole unit is rated for 600V AC and provides adjustable long-time and instantaneous (LI) protection functions across a 700A current range. The device measures 10.5 inches in depth, 7 inches in height, and 5.5 inches in width, weighing 5.136 lb, and is constructed as part of the Mark 75 family. It is UL Listed and compatible with NB, HNB, and NBY frame sizes, ensuring compliance with North American safety standards. Typical applications include protecting feeders, motors, and transformers in manufacturing plants, commercial buildings, and heavy machinery installations.

Key Features & Specifications
  • Type: Thermal magnetic trip unit with LI (Long-Time and Instantaneous) functions
  • Voltage Rating: 600V AC
  • Current Rating: 700A (minimum and maximum)
  • Dimensions: 10.5 in x 7 in x 5.5 in (Depth x Height x Width)
  • Standards: UL Listed
  • Applications: Industrial power distribution, feeder protection, motor circuits
  • Poles: 3
  • Protection: Thermal Magnetic
  • Compatible Frames: NB, HNB, NBY
  • Family: MARK 75
  • Country of Origin: United States


Product Identification
  • UPC: 786679192504
  • GTIN: 00786679192504