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Cutler Hammer HMDL3400 - Molded Case Circuit Breaker 400A 600V 3P

Cutler Hammer
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Cutler Hammer HMDL3400 is a molded case circuit breaker designed for providing reliable overcurrent protection in demanding three-phase industrial power distribution systems. It features a 400A current rating and a 600V voltage rating, housed within a compact M-frame design measuring 18 x 8 x 11 inches and weighing 20 lb. This UL-listed, thermal-magnetic breaker offers both long-time and instantaneous (LI) trip functions with a 65kA interrupting capacity at 480V, ensuring compliance with critical safety standards. Its feed-thru connection and robust construction, rated for operation from -25 to 70 °C, make it suitable for main feeder and branch circuit protection in industrial panels, switchgear, and motor control centers.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal-Magnetic Protection, HMDL Series C
  • Voltage Rating: 600V AC
  • Current Rating: 400A
  • Dimensions: 18 in (L) x 8 in (H) x 11 in (W)
  • Standards: UL Listed
  • Applications: Industrial Power Distribution, Main Feeder & Branch Circuit Protection
  • Switch Type: Circuit Breaker
  • Configuration: Fixed
  • Phase: 3
  • Amperage: 400A
  • AIC Rating: 65kA @ 480V
  • Connection: Feed-Thru
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: Long Time and Instantaneous Trip (LI)
  • Frame Size: M Frame
  • Trip Type: Thermal Magnetic
  • Temp Rating: -25°C to 70°C (-13°F to 158°F)
  • Certification: UL Listed
  • Country of Origin: United States
  • Weight: 20 lb


Product Identification
  • UPC: 782114586037
  • GTIN: 00782114586037