DK2400Y - 400Amp Circuit Breaker

DK2400Y - 400Amp Circuit Breaker

When a critical piece of electrical equipment needs a replacement breaker, matching the original specifications matters. The Eaton DK2400Y is a 400 Amp, 2-pole molded case circuit breaker from the trusted Series C K-Frame family, designed to provide the overcurrent protection required in many commercial and industrial power distribution systems.

Whether you're maintaining an existing facility, replacing a failed breaker, or supporting a scheduled shutdown project, the DK2400Y offers the ratings and configuration needed for many legacy installations. Featuring a T186 thermal magnetic trip unit, this breaker helps protect electrical equipment and conductors from overloads and short circuits while maintaining compatibility with systems originally designed around Eaton's Series C platform.

Built for demanding commercial and industrial environments, the DK2400Y is commonly found protecting feeder circuits, distribution equipment, and large electrical loads in manufacturing plants, institutional facilities, office buildings, and infrastructure projects. Its K-Frame design, line-side terminal configuration, and established Series C construction make it a practical solution for maintaining the original design and operating characteristics of existing electrical systems.

Key Features and Benefits

• 400 Amp continuous current rating
• Two-pole molded case circuit breaker
• Eaton Series C K-Frame design
• T186 thermal magnetic trip unit
• 65kAIC interrupting capacity at 240 VAC
• 10kAIC interrupting capacity at 250 VDC
• Complete breaker assembly
• Rear-mounted shunt trip with left pigtail
• Shunt trip rated 208-380 VAC or 110-127 VDC
• Rated for 50/60 Hz electrical systems
• Helps protect conductors and equipment from overload and short-circuit conditions
• Commonly used in commercial and industrial power distribution systems
• Frequently installed during maintenance, repair, and replacement applications
• Maintains compatibility with existing Series C K-Frame installations
• Built to last for long-term service in demanding electrical environments
• Line-side terminal configuration for specified connection requirements

Technical Specifications

• Catalog Number: DK2400Y
  
• Product Type: Molded Case Circuit Breaker
  
• Series: Series C
  
• Circuit Breaker Type: DK
  
• Frame Size: K-Frame
  
• Breaker Configuration: Complete Breaker
  
• Amperage Rating: 400 Amps
  
• Number of Poles: 2
  
• Voltage Rating: 240 VAC, 250 VDC
  
• Trip Type: T186 Thermal Magnetic
  
• Interrupting Capacity: 65kAIC @ 240 VAC
  
• Interrupting Capacity (DC): 10kAIC @ 250 VDC
  
• Frequency Rating: 50/60 Hz
  
• Shunt Trip: 208-380 VAC or 110-127 VDC Rear Mounted with Left Pigtail
  
• Terminal Configuration: Line Side
  
• Length/Depth: 4.1 in.
  
• Height: 5.5 in.
  
• Width: 5.5 in.
  
• Product Weight: 11.5 lbs.
  
• UPC: 786679044575
  

Material Compliance and Certifications

• UL Listed: Manufactured as part of the Eaton Series C molded case circuit breaker family.
• Application Requirements: Designed for use in electrical distribution systems requiring properly rated overcurrent protection.
• Code Compliance: Intended for installation in accordance with applicable electrical codes and equipment specifications.
• Installation Guidance: Suitable for installation and servicing by qualified electrical professionals.
• Special Configuration: Incorporates a factory-installed shunt trip for applications requiring remote tripping functionality.
  

Where It Works Best

• Commercial electrical distribution systems
• Industrial manufacturing facilities
• Institutional and educational campuses
• Government and municipal facilities
• Feeder circuit protection applications
• Electrical distribution equipment
• Mechanical and process equipment power distribution
• Switchboard and panelboard installations
• Electrical maintenance and repair projects
• Facility modernization and refurbishment programs
• Existing Eaton Series C K-Frame systems requiring compatible replacement breakers
• Applications requiring remote tripping through a shunt trip accessory
• Systems requiring 400 Amp, 2-pole overcurrent protection with 65kA interrupting capacity

For facilities operating equipment originally designed around Series C K-Frame molded case circuit breakers, the DK2400Y provides a compatible replacement solution that helps maintain original electrical ratings, fitment requirements, accessory functionality, and intended protection characteristics while preserving the existing system design.