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Westinghouse 504C740G21 - Molded Case 150A 600V 3-Pole

Westinghouse
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Westinghouse 504C740G21 is a 3-pole molded case circuit breaker from the MARK 75 family, designed for thermal-magnetic protection with LI (Long-Time and Instantaneous) functions in low voltage distribution systems. Rated for 150A continuous current at 600V maximum voltage, this unit delivers an interrupting capacity of 35kA at 480V to handle fault conditions. The bolt-on connection ensures secure panel mounting, and the unit weighs 29 lb for robust construction. It complies with UL489, CSA, and IEC 60947-2 standards for industrial safety. Typical applications include industrial power distribution and commercial electrical panels requiring reliable overload and short-circuit protection.

Key Features & Specifications
  • Type: Molded Case
  • Family: MARK 75
  • Type: HLA
  • Weight: 29 lb
  • Functions: LI - Long-Time and Instantaneous
  • Voltage Rating: 600V
  • Poles: 3
  • Connection: Bolt-On
  • Protection: Thermal Magnetic
  • AIC rating: 35kA@480V
  • Phase: 3
  • Current Rating: 150A
  • Amperage: 150A
  • Mounting Type: Bolt-On
  • Interrupt Rating: 35kA @ 480V
  • Series/Frame: Series C
  • Frame Size: 150A
  • Trip Unit: Thermal-Magnetic
  • Standards: UL489, CSA, IEC 60947-2


Part Number: 504C740G21