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Eaton MDL3400W - Molded Case Circuit Breaker 400A 600V

Cutler Hammer
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Eaton MDL3400W is a Series C molded case circuit breaker designed for overcurrent protection in industrial and commercial power distribution systems. This three-pole breaker is rated for 400A at 600VAC and 250VDC, with an interrupting capacity of 50kAIC at 480VAC and 65kAIC at 240VAC, operating at 50/60 Hz. It features a bolt-on connection, an M frame size, and a thermal magnetic protection mechanism with LI (Long-Time and Instantaneous) trip functions, though it does not include lugs. The unit is UL Listed for safety compliance and manufactured in the United States. Typical applications include protecting feeders and branch circuits in switchboards, panelboards, and industrial control panels.

Key Features & Specifications
  • Type: Molded Case
  • Family: Series C
  • Frame Size: M Frame
  • Current Rating: 400A
  • Voltage Rating: 600VAC, 250VDC
  • Poles: 3
  • Phase: 3
  • Interrupt Rating: 50kAIC at 480VAC, 65kAIC at 240VAC
  • Frequency Rating: 50/60 Hz
  • Connection: Bolt-On
  • Protection: Thermal Magnetic
  • Trip Unit: Fixed thermal, fixed magnetic
  • Functions: LI - Long-Time and Instantaneous
  • Certification: UL Listed
  • Country of Origin: United States


Product Identification
  • UPC: 782116056392
  • GTIN: 00782116056392