Eaton KD3350W - 350 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Eaton KD3350W is a 350A, 600V, 3-pole bolt-on molded case circuit breaker engineered to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. Its secure bolt-on mounting creates a rigid, vibration-resistant connection to the bus, helping maintain consistent electrical performance even in demanding installations.

Why this breaker stands out

• Secure bolt-on mounting ensures a robust connection to the busbar, reducing the risk of loosening in environments with vibration or movement.
• Thermal-magnetic trip unit delivers stable, repeatable protection by combining precise thermal protection with fast magnetic response for short circuits.
• OEM compatibility designed to work with matching OEM loadcenters and panelboards for seamless integration and reliable protection across configurations.
• Three-pole, 350A at 600V configuration supports heavy three-phase distribution, making it suitable for larger loads and complex electrical systems.
• Molded-case reliability built to withstand everyday electrical noise and loads while delivering consistent performance across residential, commercial, and light industrial applications.

What it protects and where it’s ideal

The KD3350W provides essential branch circuit overcurrent and short-circuit protection for a wide range of installations. It’s particularly well-suited for three-phase distribution in

• residential and commercial panelboards serving high-demand equipment
• light industrial electrical rooms with motor loads
• feeders and large-draw circuits where reliable protection is critical

Whether you’re upgrading an existing panel or configuring a new distribution setup, this breaker offers a dependable balance of protection, compatibility, and long-term durability.

Technical snapshot

• Manufacturer: Eaton
• Part Number: KD3350W
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 350A
• Voltage Rating: 600V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Practical tips for installation and use

For optimal performance, pair the KD3350W with compatible OEM loadcenters and panelboards to ensure alignment with the bus and rated trip characteristics. When installing, follow the panel manufacturer’s torque and mounting guidelines to maintain a solid, vibration-resistant connection. Use this 3-pole breaker in three-phase systems where coordinated shutdown across all phases is essential for equipment safety and protection.