DK3350W - 350Amp Circuit Breaker

DK3350W - 350 Amp Circuit Breaker

If you’re running a system where reliability isn’t optional, the Eaton DK3350W molded case circuit breaker is built to keep things operating smoothly when it matters most. Designed for higher-capacity electrical distribution, this 350 amp, three-pole breaker gives you solid, dependable protection against overloads and short circuits—without overcomplicating your setup. It’s part of Eaton’s well-known Series C line, which has earned its reputation for consistent performance in demanding commercial and industrial environments.

What really makes the DK3350W stand out is how it balances power and precision. The built-in T186 thermal-magnetic trip unit reacts quickly to faults while avoiding unnecessary nuisance trips, so your equipment stays protected and your downtime stays low. With strong interrupting ratings—65 kAIC at 240 Vac and 10 kAIC at 250 Vdc—you’re covered even in high fault current situations. And because it supports both AC and DC applications, it gives you flexibility when designing or upgrading your electrical system.

Its compact K-frame design helps maximize panel space, which is always a win in tighter installations. Whether you’re maintaining an existing system or building something new, this breaker fits in without adding headaches.

Key Features and Benefits

• Handles demanding loads with a 350 amp capacity
• Three-pole design for complete circuit protection
• Thermal-magnetic trip unit (T186) helps prevent overloads and short circuits
• High interrupting capacity for added safety in fault conditions
• Works in both AC and DC applications for greater flexibility
• Space-saving K-frame design for efficient panel layouts
• Built as a complete breaker for easier integration into your system
• Part of Eaton’s trusted Series C lineup

Technical Specifications

• Catalog Number: DK3350W
  
• Product Type: Molded Case Circuit Breaker
  
• Series: Series C
  
• Frame Type: K Frame
  
• Amperage Rating: 350 A
  
• Voltage Rating: 240 Vac / 250 Vdc
  
• Frequency Rating: 50–60 Hz
  
• Trip Type: T186 (Thermal-Magnetic)
  
• Interrupt Rating:
  • 65 kAIC at 240 Vac
  • 10 kAIC at 250 Vdc
• Number of Poles: 3
  
• Terminals: Without terminals
  
• Dimensions (H x W x D): 5.5 in x 5.5 in x 4.1 in
  
• Weight: 11.3 lb
  

Material Compliance and Certifications

• UL Listed for safety and performance you can trust
• Built to meet industry standards for consistent, long-term operation

Where It Works Best

The Eaton DK3350W is a great fit for commercial and industrial applications where higher amperage and dependable protection are critical. You’ll commonly see it in distribution panels, motor control centers, and systems supporting large equipment like HVAC units or manufacturing machinery. It’s especially useful in environments where both AC and DC circuits are present, giving you one reliable solution across multiple applications.