DK3300Y - 300Amp Circuit Breaker

DK3300Y - 300Amp Circuit Breaker

The Eaton DK3300Y is a 300 Amp, 3-pole molded case circuit breaker designed for electrical distribution systems that utilize the trusted Series C K-Frame platform. Built as a complete breaker assembly, the DK3300Y is commonly used in commercial and industrial facilities where maintaining the original equipment specifications is important during maintenance, repair, or replacement projects. With its combination of amperage capacity, interrupting rating, and thermal magnetic protection, this breaker helps provide dependable overcurrent protection while maintaining compatibility with existing Eaton Series C installations.

Equipped with a T186 thermal magnetic trip unit, the DK3300Y is designed to respond to both overload and short-circuit conditions. The breaker carries an interrupting rating of 65kAIC at 240 VAC and 10kAIC at 250 VDC, making it suitable for applications requiring properly rated fault protection. This model includes line-side terminals and operates on 50/60 Hz systems, supporting a wide range of power distribution applications found in manufacturing facilities, commercial buildings, educational campuses, municipal properties, and other industrial environments.

When you're replacing an existing molded case circuit breaker, matching the original frame size, pole configuration, trip characteristics, voltage ratings, and interrupting capacity can help preserve the intended operation of the electrical system.

Key Features and Benefits

• 300 Amp continuous current rating
• Three-pole molded case circuit breaker
• Eaton Series C K-Frame design
• Complete breaker assembly
• T186 thermal magnetic trip unit
• Includes line-side terminals
• 65kAIC interrupting capacity at 240 VAC
• 10kAIC interrupting capacity at 250 VDC
• Suitable for AC and DC applications within specified ratings
• Designed for 50/60 Hz electrical systems
• Helps protect circuits from overload and short-circuit conditions
• Commonly used in commercial and industrial electrical distribution systems

Technical Specifications

• Catalog Number: DK3300Y
  
• Manufacturer: Eaton
  
• Product Type: Molded Case Circuit Breaker
  
• Series: Series C
  
• Circuit Breaker Type: DK
  
• Frame Size: K-Frame
  
• Breaker Configuration: Complete Breaker
  
• Amperage Rating: 300 Amps
  
• Number of Poles: 3
  
• Voltage Rating: 240 VAC, 250 VDC
  
• Trip Unit: T186 Thermal Magnetic
  
• Interrupting Capacity: 65kAIC @ 240 VAC
  
• Interrupting Capacity (DC): 10kAIC @ 250 VDC
  
• Frequency Rating: 50/60 Hz
  
• Terminal Configuration: Line Side Terminals
  
• Length/Depth: 4.1 in.
  
• Height: 5.5 in.
  
• Width: 5.5 in.
  
• Weight: 11.5 lbs.
  
• UPC: 786679044599
  

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, maintenance, and servicing by qualified electrical professionals.
• Manufacturing Standards: Manufactured to meet applicable Eaton certification and compliance requirements.
  

Where It Works Best

• Commercial electrical distribution systems
• Industrial manufacturing facilities
• Educational and institutional campuses
• Municipal and government facilities
• Feeder circuit protection applications
• Switchboards and switchgear installations
• Panelboards requiring compatible K-Frame breakers
• Electrical distribution equipment
• Mechanical and process equipment power systems
• Facility maintenance and repair projects
• Electrical modernization and refurbishment programs