DK3350 - 350Amp Circuit Breaker

DK3350 - 350 Amp Circuit Breaker

When you’re maintaining or servicing an existing electrical system, the last thing you want is guesswork around fit or compatibility. The Eaton DK3350 molded case circuit breaker is built to match the exact requirements of systems designed for Series C K-frame breakers, delivering dependable 350-amp protection across three poles. Whether you're working in a commercial facility or an industrial environment, this breaker is designed to slot into place with confidence helping keep your system operating as intended without unnecessary changes. With support for both 240 Vac and 250 Vdc applications and a proven T186 trip unit, the DK3350 provides consistent circuit protection where it matters most. Its compact footprint and solid construction reflect a design that’s made to last, even in demanding conditions.

Key Features and Benefits

• 350A rating handles substantial electrical loads in commercial and industrial systems
• Three-pole design ensures balanced protection across all phases
• Built for Series C applications, supporting proper fit and seamless replacement
• T186 trip unit delivers consistent overcurrent protection
• Compatible with both AC and DC systems (240 Vac / 250 Vdc)
• Interrupt ratings of 65 kAIC at 240 Vac and 10 kAIC at 250 Vdc
• Line and load terminals allow for flexible installation
• Aluminum terminals provide reliable conductivity and secure connections
• Designed for long-term use in demanding environments

Technical Specifications

• Catalog Number: DK3350
  
• Product Type: Molded Case Circuit Breaker
  
• Series: Series C
  
• Frame Type: K Frame
  
• Breaker Type: DK
  
• Trip Type: T186
  
• Amperage Rating: 350 A
  
• Voltage Rating: 240 Vac / 250 Vdc
  
• Frequency Rating: 50/60 Hz
  
• Interrupt Rating:
  • 65 kAIC @ 240 Vac
  • 10 kAIC @ 250 Vdc
• Number of Poles: 3
  
• Terminals: Line and Load
  
• Terminal Material: Aluminum
  
• Dimensions (H x W x D): 5.5 in x 5.5 in x 4.1 in
  
• Weight: 11.5 lb
  

Material Compliance and Certifications

• UL Listed
• Meets established industry safety and performance standards for molded case circuit breakers
• Suitable for use in systems requiring UL-recognized components

Where It Works Best

The DK3350 is a strong fit for facilities that rely on existing Series C K-frame infrastructure think manufacturing plants, commercial buildings, and large-scale mechanical systems. It’s especially useful in maintenance or replacement scenarios where matching the original breaker’s specifications is critical. From distribution panels to equipment protection, this breaker helps keep operations running smoothly without the need for redesign or modification.