Eaton KDB3300X - 300 A, 600 V, 3-Pole Circuit Breaker | AmpState

The Eaton KDB3300X is a 300A, 600V, 3-pole molded case circuit breaker designed to deliver reliable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. Its compact form factor maximizes space in crowded panels, while a thermally responsive magnetic trip unit provides stable, repeatable protection across a range of operating conditions.

Key advantages that power your panels

• Compact molded-case design saves panel space without sacrificing protection performance.
• Thermal-magnetic trip unit delivers precise protection for both overloads and instantaneous short circuits, with consistent trip characteristics across temperature variations.
• 300A rating suited for high-current branch circuits and feeders in commercial and light industrial settings.
• 600V voltage rating aligns with common building electrical distributions for reliable, safe operation.
• 3-pole configuration ideal for three-phase systems, ensuring balanced protection across all phases.
• OEM compatibility engineered to mate with matching Eaton panelboards and loadcenters, simplifying installation and ensuring correct electrical performance.

Technical snapshot

• Manufacturer: Eaton
• Part Number: KDB3300X
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 300A
• Voltage Rating: 600V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Ideal applications

Perfect for residential, commercial, and light industrial environments where dependable protection is essential. Use the KDB3300X as a main breaker or as a high-capacity feeder protection device in panelboards and loadcenters, especially in three-phase service setups.

What sets it apart

Unlike generic MCCBs, the KDB3300X combines a compact footprint with a robust thermal-magnetic trip mechanism, delivering predictable protection that professionals can trust in real-world conditions. Its OEM-focused design means a seamless fit with Eaton panel ecosystems, reducing installation risks and compatibility concerns.

Practical tips for installation and use

• Confirm panelboard compatibility to ensure full electrical performance and uphold warranty coverage.
• Match the 300A rating to your feeder or main protection needs based on load calculations for your installation.
• Follow Eaton’s installation guidelines for torque specifications and termination practices to maintain optimal protection and minimize contact resistance.

Equip your electrical system with a dependable, high-capacity protection device—the Eaton KDB3300X 3-pole molded case circuit breaker—and experience consistent, code-compliant protection for critical circuits.