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Eaton HLD3400Y - Molded Case Breaker 400A 600V (L-Frame)

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Eaton HLD3400Y is a three-pole molded case circuit breaker from the Series C family, designed for overcurrent protection in industrial power distribution systems. It is rated for 400 amperes at 600 volts AC, with an interrupting capacity of 65 kAIC at 480 volts AC, and features a thermal magnetic trip unit providing long-time and instantaneous (LI) protection. The breaker utilizes an L-frame size with a bolt-on mounting connection, weighing 22 lb, and operates on three-phase systems. It complies with industry standards for reliable performance in demanding environments. Typical applications include industrial power distribution, motor control centers, and main service entrance panels.

Key Features & Specifications
  • Manufacturer: Eaton
  • Item Subcategory: Molded Case
  • Family: Series C
  • Type: HLD
  • Weight: 22 lb
  • Functions: LI - Long-Time and Instantaneous
  • Frame Size: L Frame
  • Voltage Rating: 600V
  • Poles: 3
  • Connection: Bolt-On
  • Protection: Thermal Magnetic
  • AIC rating: 65kA@480V
  • Phase: 3
  • Current Rating: 400A
  • DC Voltage Rating: 250 Vdc
  • Interrupt Rating: 100 kAIC at 240 Vac
  • Trip Unit: Fixed Thermal and Fixed Magnetic


Part Number: HLD3400Y