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Westinghouse HFB1070 - Molded Case 70A 277V (1-Pole)

Westinghouse
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Westinghouse HFB1070 is a 1-pole molded case circuit breaker from the MARK 75 series, designed for overcurrent protection using a thermal magnetic trip unit with LI (Long-Time and Instantaneous) functions. It is rated for 70A at 277V AC, with a high interrupting capacity of 65kA symmetrical at 277V AC. The breaker features a bolt-on connection style, weighs 1 lb, and is built for single-phase applications. It complies with federal specification W-C-375b, ensuring reliable performance in demanding environments. Typical applications include industrial power distribution panels and commercial electrical systems requiring robust short-circuit and overload protection.

Key Features & Specifications
  • Type: HFB
  • Family: MARK 75
  • Current Rating: 70 Amp
  • Voltage Rating: 277 Volt AC
  • Poles: 1
  • Phase: 1
  • Connection: Bolt-On
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous
  • AIC Rating: 65,000 A Symmetrical at 277 VAC
  • Weight: 1 lb
  • Certifications: Meets Federal Specification W-C-375b