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Square D Q4P3400 - 400A 3-Pole Molded Case Breaker

Square D
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The Square D Q4P3400 is a 400A molded case circuit breaker designed for overcurrent protection in industrial power distribution systems. This three-pole unit operates at 240V AC with a 25kA interrupting capacity, utilizing thermal magnetic protection with LI (Long-Time and Instantaneous) trip functions. The bolt-on connection design and 16 lb weight facilitate secure panel mounting in standard load centers. Compliance with UL and NEMA standards ensures reliable performance in commercial and industrial environments. Typical applications include main breaker service entrance panels, feeder circuits, and heavy machinery protection in manufacturing facilities.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker
  • Voltage Rating: 240V AC
  • Current Rating: 400A
  • Poles: 3
  • Connection: Bolt-On
  • Protection: Thermal Magnetic
  • AIC Rating: 25kA@240V
  • Phase: 3
  • Functions: LI - Long-Time and Instantaneous
  • Weight: 16 lb
  • Standards: UL, NEMA
  • Applications: Industrial power distribution, main breaker panels, feeder circuits


Product Identification
  • UPC: 785901154471