DK3300W - 300Amp Circuit Breaker

DK3300W - 300Amp Circuit Breaker

Finding the right replacement circuit breaker isn't always as simple as matching the amperage. The Eaton DK3300W is a 300 Amp, 3-pole molded case circuit breaker designed for electrical systems that depend on the proven Series C K-Frame platform. Whether you're replacing an existing breaker during scheduled maintenance or sourcing a compatible unit for a repair project, the DK3300W is designed to help maintain the original protection characteristics and fitment requirements of the equipment already in service.

At the heart of the breaker is a T186 thermal magnetic trip unit, which helps protect electrical circuits from overloads and short-circuit conditions. With a 65kA interrupting rating at 240 VAC and 10kAIC at 250 VDC, the DK3300W is commonly used in commercial and industrial power distribution systems where properly rated fault protection is required. Because this model is supplied without terminals, it can be used in applications where terminal hardware is specified separately or where existing installation requirements call for a particular configuration.

You'll often find breakers like the DK3300W protecting feeder circuits, distribution equipment, switchboards, and panelboards in manufacturing facilities, office buildings, institutions, and municipal properties.

Key Features and Benefits

• 300 Amp continuous current rating
• Three-pole molded case circuit breaker
• Eaton Series C K-Frame construction
• T186 thermal magnetic trip unit
• Complete breaker assembly
• Supplied without 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
• Ideal for maintenance, repair, and replacement applications
• Maintains compatibility with existing Eaton Series C K-Frame installations
• Built to last for long-term service in demanding environments

Technical Specifications

• Catalog Number: DK3300W
  
• Product Type: Molded Case Circuit Breaker
  
• Manufacturer: Eaton
  
• 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 Type: T186 Thermal Magnetic
  
• Interrupting Capacity: 65kAIC @ 240 VAC
  
• Interrupting Capacity (DC): 10kAIC @ 250 VDC
  
• Frequency Rating: 50/60 Hz
  
• Terminal Configuration: Without Terminals
  
• Length/Depth: 4.1 in.
  
• Height: 5.5 in.
  
• Width: 5.5 in.
  
• Product Weight: 11.35 lbs.
  
• UPC: 786679044674
  

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.
• Manufacturing Standards: Manufactured to meet applicable Eaton product standards and certification 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
• Panelboard applications requiring compatible K-Frame breakers
• Electrical distribution equipment
• Mechanical and process equipment power systems
• Facility maintenance and repair projects
• Electrical modernization and refurbishment programs
• Existing Eaton Series C K-Frame systems requiring form, fit, and functional replacement
• Applications requiring 300 Amp, 3-pole overcurrent protection
• Systems requiring 65kA interrupting capacity at 240 VAC