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Westinghouse HLB3400 - Molded Case Circuit Breaker 400A 600V 3P

Westinghouse
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Westinghouse HLB3400 is a molded case circuit breaker designed for providing reliable overcurrent protection in three-phase industrial power distribution systems. It features a 400A continuous current rating and a 600V AC voltage rating, with a robust thermal-magnetic trip unit providing both long-time and instantaneous (LI) protection functions. The breaker is constructed as a three-pole, bolt-on unit within the compact MARK 75 family frame, weighing 20 lb, and is engineered to interrupt faults with an AIC rating of 35kA at 480V. It is built to meet applicable industry standards for safety and performance, making it suitable for use in panelboards, switchboards, and industrial control equipment.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal-Magnetic Protection, Bolt-On Connection
  • Voltage Rating: 600V AC
  • Current Rating: 400A
  • Frame: MARK 75 Family
  • Poles: 3
  • Phase: 3
  • Protection Functions: LI (Long-Time and Instantaneous)
  • AIC Rating: 35kA @ 480V
  • Connection: Bolt-On
  • Weight: 20 lb