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Westinghouse HFB1050 - Molded Case Breaker 50A 1P 277V

Westinghouse
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Westinghouse HFB1050 is a molded case circuit breaker designed for providing reliable overcurrent protection in industrial and commercial electrical systems. It features a 50A current rating and a 277V AC voltage rating, suitable for single-phase applications. The breaker is constructed as a compact, single-pole unit with a bolt-on connection and a thermal magnetic protection mechanism that combines long-time delay and instantaneous tripping functions (LI) to guard against both overloads and short circuits. It complies with industry standards for safety and performance, including an interrupting capacity of 65kA at 277V. Typical applications include protection for feeders, branch circuits, and equipment within industrial control panels and distribution boards.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal Magnetic Protection, Bolt-On Connection
  • Voltage Rating: 277V AC
  • Current Rating: 50A
  • Poles: 1
  • Phase: 1
  • AIC Rating: 65kA @ 277V
  • Protection Functions: LI (Long-Time and Instantaneous)
  • Connection Type: Bolt-On
  • Family: MARK 75
  • Type Designation: HFB
  • Weight: 1 lb


Product Identification
  • Manufacturer: Westinghouse
  • Model: HFB1050