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Westinghouse HFB3040L - 40A 3-Pole 600V Circuit Breaker

Westinghouse
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Westinghouse HFB3040L Circuit Breaker - 40A 3-Pole 600V Thermal Magnetic The Westinghouse HFB3040L is a 40 Amp, 3-pole molded case circuit breaker from the MARK 75 family, designed for overcurrent protection in three-phase power systems. It operates at a maximum voltage rating of 600V and provides LI (Long-Time and Instantaneous) protection functions through a thermal magnetic trip mechanism. This unit features a feed-thru connection type, weighs 11 lb, and is built for bolt-on mounting in electrical panels. The breaker is rated with an interrupting capacity of 25kA at 480V and complies with industry standards for safety and performance in industrial environments. It is typically used in commercial and industrial applications requiring reliable circuit protection for three-phase equipment and distribution systems.

Key Features & Specifications
  • Manufacturer: Westinghouse
  • Part Number: HFB3040L
  • Item Subcategory: Molded Case
  • Family: MARK 75
  • Type: HFB
  • Functions: LI - Long-Time and Instantaneous
  • Voltage Rating: 600V
  • Current Rating: 40A
  • Poles: 3
  • Phase: 3
  • Connection: Feed-Thru
  • Protection: Thermal Magnetic
  • AIC Rating: 25kA@480V
  • Weight: 11 lb
  • Mounting Type: Bolt-On