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Westinghouse HKA3125 - 125A 3-Pole Molded Case Circuit Breaker

Westinghouse
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Westinghouse HKA3125 is a three-pole molded case circuit breaker from the MARK 75 family, designed for thermal magnetic overcurrent and short-circuit protection in industrial and commercial power distribution systems. It is rated for 125A at 600VAC with a 35kA interrupting capacity at 480V, utilizing LI (Long-Time and Instantaneous) trip functions for coordinated protection. The unit weighs 19 lb, features a bolt-on connection for secure panelboard installation, and is constructed on the HKA frame for robust performance. It is UL certified for compliance with North American safety standards. This breaker is suited for protecting feeders, motors, and branch circuits in manufacturing plants, commercial buildings, and switchgear assemblies.

Key Features & Specifications
  • Type: HKA
  • Family: MARK 75
  • Poles: 3
  • Current Rating: 125A
  • Voltage Rating: 600V
  • Phase: 3
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous
  • Connection: Bolt-On
  • AIC Rating: 35kA@480V
  • Weight: 19 lb
  • Certification: UL