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Square D LHL3640022M - Molded Case Breaker 400A 600V 3-Pole

Square D
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Square D LHL3640022M is a three-pole molded case circuit breaker designed for magnetic-only instantaneous protection in industrial power distribution systems. It is rated for 400A continuous current at 600V AC, with a high interrupting capacity of 35kA at 480V, and utilizes a feed-thru connection for straightforward line and load wiring. This 20 lb unit features an instantaneous trip function (I) that provides rapid response to short-circuit faults without thermal delay, ensuring equipment protection in motor control centers and switchboards. The breaker complies with UL and NEMA standards for molded case circuit breakers, making it suitable for use in three-phase, 60 Hz systems requiring reliable overcurrent protection. Typical applications include feeder circuits, panelboards, and industrial machinery where magnetic-only protection is specified to coordinate with downstream thermal overloads.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, magnetic-only instantaneous trip
  • Voltage Rating: 600V AC
  • Current Rating: 400A
  • Poles: 3
  • Phase: 3
  • Connection: Feed-Thru
  • Protection: Magnetic Only
  • AIC rating: 35kA@480V
  • Functions: I - Instantaneous
  • Weight: 20 lb
  • Standards: UL, NEMA
  • Applications: Industrial power distribution, motor control centers, switchboards
  • Circuit Breaker Mounting Style: Fixed
  • Terminal Connection: Feed-Thru
  • Frequency Rating: 60 Hz
  • Phase Connection: 3-Phase
  • Breaker Frame: LHL
  • Installation Type: Panelboard or Switchboard
  • Item QTY: 1


Product Identification
  • UPC: Not provided
  • GTIN: Not provided