Eaton HKD3300X 300A 600V 3-Pole Circuit Breaker

The Eaton HKD3300X is a high-capacity, bolt-on molded case circuit breaker designed to deliver dependable branch circuit protection in panelboards and load centers. With a 300A rating, 600V rating, and 3-pole construction, this device is built to handle demanding three-phase power systems while maintaining precise, reliable protection.

Key benefits that matter in real-world installations

• Secure bolt-on mounting: Delivers a rigid, vibration-resistant bus connection for long-term reliability in commercial and light industrial environments.
• Thermal-magnetic trip unit: Ensures stable, repeatable protection performance for overloads and short circuits across varying loads and conditions.
• Panel and load center compatibility: Designed to pair with matching OEM loadcenters and panelboards, simplifying replacements and upgrades without sacrificing fit or protection quality.
• Three-pole protection: Ideal for 3-phase distribution, providing comprehensive protection across all phases in one compact device.
• Wide application range: Suitable for residential, commercial, and light industrial applications where robust branch-circuit protection is needed.

Product snapshot

• Thermal-magnetic molded case circuit breaker
• 300A
• 600V
• 3
• Bolt-on
• Branch circuit overcurrent and short-circuit protection
• Eaton
• HKD3300X

Who benefits from the HKD3300X

Engineers and electricians securing reliable protection for three-phase systems will appreciate the HKD3300X’s sturdy mechanical design and precise trip behavior. It’s an excellent choice when upgrading panelboards to handle higher current demands, retrofitting existing installations, or expanding service capacity in light commercial spaces or industrial equipment rooms.

Practical use cases

• Upgrading a three-phase panelboard to safely carry a 300A load with predictable protection against overloads and short circuits.
• Installing in commercial electrical rooms where vibration resistance and secure bus connections improve long-term reliability.
• Replacing legacy bolt-on breakers in OEM panelboards to maintain consistent protection without reconfiguring wiring or bus bars.
• Applying in light industrial facilities that require dependable, ready-to-trip protection for critical three-phase circuits.

Installation and maintenance considerations

• Ensure full compatibility with the matching OEM loadcenters and panelboards to maintain intended protection and coordination.
• Verify secure mounting and proper torque on the bolt-on connections to maximize bus stability and minimize electrical noise.
• Keep electrical panels organized and seals intact to preserve protection performance in environments subject to vibration or movement.

With its combination of high-current capacity, rugged mounting, and precise thermal-magnetic protection, the Eaton HKD3300X 3-pole bolt-on circuit breaker is a purpose-built solution for dependable branch circuit protection in modern panelboards and load centers. It’s a pragmatic choice for professionals who demand durable performance, straightforward installation, and compatibility with established OEM ecosystems.