DK3300W - 300Amp Circuit Breaker

DK3300W - 300 Amp Circuit Breaker

The Eaton DK3300W is a 300 amp, three-pole molded case circuit breaker designed for use in commercial and industrial electrical distribution systems that require dependable high-capacity protection. As part of Eaton’s well-known Series C K-Frame breaker line, the DK3300W is built to manage higher electrical loads while helping protect equipment from overloads and short-circuit conditions. The breaker features a T186 thermal-magnetic trip unit, which responds to both sustained overcurrent and instantaneous fault events. With an interrupting rating of 65 kAIC at 240 VAC, it is capable of safely interrupting high fault currents that may occur in demanding electrical environments. This model is rated for 240 Vac and 250 Vdc systems and operates at standard 50–60 Hz frequencies, making it suitable for a wide range of distribution setups. The three-pole configuration provides coordinated protection for three-phase power circuits often found in larger commercial buildings, industrial equipment, and facility infrastructure. Designed as a complete breaker within the K-Frame platform, the DK3300W offers the performance expected from Eaton’s Series C breakers while maintaining a compact footprint that fits well in many switchboards and panelboard assemblies. Electricians and maintenance teams frequently rely on this breaker when consistent circuit protection is needed in higher-amperage applications.

Key Features and Benefits

• 300 Amp current rating designed for higher-capacity electrical circuits
• Three-pole configuration for use with three-phase electrical systems
• Part of Eaton’s Series C K-Frame breaker family
• T186 thermal-magnetic trip unit helps protect against overloads and short circuits
• 65 kAIC interrupt rating at 240 Vac for handling high fault current levels
• Suitable for both AC and DC applications with ratings up to 240 Vac and 250 Vdc
• Molded case design commonly used in panelboards and switchgear

Technical Specifications

• Catalog Number: DK3300W
• Product Type: Molded Case Circuit Breaker
• Series: Series C
• Breaker Type: DK
• Frame: K-Frame
• Configuration: Complete Breaker
• Amperage Rating: 300 A
• Voltage Rating: 240 Vac / 250 Vdc
• Poles: 3
• Trip Unit: T186
• Interrupt Rating:
  • 65 kAIC at 240 Vac
  • 10 kAIC at 250 Vdc
• Frequency Rating: 50–60 Hz
• Terminals: Without terminals

Dimensions

• Height: 5.5 in
• Width: 5.5 in
• Depth: 4.1 in
• Weight: 11.35 lb

Material Compliance and Certifications

• UL Listed, meeting recognized safety standards for molded case circuit breakers used in electrical power distribution systems.

Where It Works Best

• Commercial electrical distribution systems
• Industrial facilities and manufacturing plants
• Switchboards and panelboards
• Building infrastructure systems
• Electrical equipment requiring three-phase circuit protection