Eaton KD3300W - 300 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

The Eaton KD3300W is a 300 A, 600 V, 3-pole bolt-on molded case circuit breaker designed to protect branch circuits in panelboards and load centers. Built for reliability in demanding environments, it delivers dependable overcurrent and short-circuit protection while staying securely attached to the bus bars.

• Secure bolt-on mounting — a rigid, vibration-resistant connection that stays tight, reducing movement and wear in panels subject to vibration or constant operation.
• Thermal-magnetic trip unit — combines thermal and magnetic sensing for stable, repeatable protection performance across varying currents and temperatures, minimizing nuisance trips while safeguarding equipment.
• OEM-compatible design — engineered to fit seamlessly with matching Eaton OEM load centers and panelboards, ensuring reliable installation and consistent protection across your distribution system.
• High-current, three-pole protection — 300 A rating with three poles provides robust protection for balanced three-phase circuits in commercial and light industrial applications.

Who benefits most from the KD3300W? electricians and facility managers upgrading or expanding electrical distributed networks in:

• Residential projects requiring larger branch-circuit protection in main distribution panels
• Commercial spaces where reliable 3-phase protection supports HVAC, lighting, and equipment mains
• Light industrial environments needing solid, durable protection for critical distribution circuits

Why choose the KD3300W over alternatives — its bolt-on construction delivers a more secure bus connection than clip-in designs, which translates to fewer loose connections over time. The thermal-magnetic trip mechanism adapts to real-world conditions, offering predictable responses to overloads and short circuits. When paired with matching Eaton panelboards, it simplifies replacement or expansion projects and helps maintain consistent safety standards across your electrical system.

Technical snapshot

• Manufacturer: Eaton
• Part Number: KD3300W
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 300 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Engineered for clarity in selection and installation, the KD3300W is a stable, long-lasting choice for safeguarding power distribution. If you’re upgrading a panel or planning a new installation in residential, commercial, or light industrial settings, this bolt-on 3-pole breaker integrates smoothly with compatible Eaton equipment and provides the reliable protection your systems depend on.