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Cutler Hammer KD3400 - Molded Case Circuit Breaker 400A 600V 3P

Cutler Hammer
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The Cutler Hammer KD3400 is a molded case circuit breaker designed to provide reliable overcurrent and short-circuit protection for three-phase industrial power systems. It features a 400A continuous current rating and a 600V AC voltage rating, housed within a compact 400A frame size with dimensions of 4.25" D x 1" H x 3.75" W and a weight of 11.5 lb. This thermal-magnetic breaker, compliant with UL, CSA, and IEC standards, offers 35kA interrupting capacity at 480V and is constructed for bolt-on connection with line/load lugs, accepting wire sizes from 250 MCM to 3 AWG. Its robust design, with an operating temperature range from -4°F to 158°F, makes it suitable for installation in motor control centers, switchboards, and enclosed controls from major manufacturers.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal-Magnetic Protection, Bolt-On Connection
  • Voltage Rating: 600V AC
  • Current Rating: 400A
  • Frame Size: 400A/K
  • Poles: 3
  • AIC Rating: 35kA @ 480V AC
  • Phase Connection: 3-Phase, ABC
  • Functions: LI (Long-Time & Instantaneous)
  • Connection: Bolt-On, Line/Load Lug
  • Wire Size Range: 250 MCM to 3 AWG
  • Dimensions: 4.25 in (D) x 1 in (H) x 3.75 in (W)
  • Weight: 11.5 lb
  • Operating Temperature: -4°F to 158°F (-20°C to 70°C)
  • Standards & Certification: UL Listed, CSA Certified, IEC Rated
  • Compatible Panel Types: Allen-Bradley MCC, Eaton MCC, Rockwell Automation Enclosed Control, Switchboard, Westinghouse
  • Breaker Type: Standard
  • Family: Series C
  • Country of Origin: Dominican Republic


Product Identification
  • UPC: 786679349199
  • GTIN: 00786679349199