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Westinghouse 371D426G33 - Molded Case Breaker, 400A 600V 3P

Westinghouse
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Westinghouse 371D426G33 is a molded case circuit breaker designed for providing instantaneous magnetic-only protection against short-circuit faults in three-phase industrial power distribution systems. It is rated for 400A at 600V AC with an interrupting capacity of 30kA at 480V, featuring a robust three-pole, bolt-on connection design within the LAB series frame. This unit is constructed for durability in demanding environments and complies with relevant industry standards for electrical protection devices. Its typical applications include service entrance protection, feeder circuits, and as a main breaker in industrial panelboards and switchgear.

Key Features & Specifications
  • Type: LAB Series Molded Case Circuit Breaker, Magnetic-Only Protection (I - Instantaneous)
  • Voltage Rating: 600V AC
  • Current Rating: 400A
  • Phase: 3
  • Poles: 3
  • Connection: Bolt-On
  • AIC Rating: 30kA @ 480V
  • Protection: Magnetic Only (Instantaneous Trip)
  • Frame: LAB Series
  • Weight: 29 lb
  • Standards: Designed to meet applicable industry standards for circuit interruption and safety.
  • Applications: Industrial power distribution, main service disconnects, feeder protection in panelboards and switchgear.
  • Note: Lugs are not included; specific lug part numbers require wiring specifications for identification.


Product Identification
  • Manufacturer Part Number: 371D426G33