Eaton KDB3300 - 300 A, 600 V, 3-Pole Circuit Breaker | AmpState

The Eaton KDB3300 300 A, 600 V, 3-pole molded case circuit breaker is built to deliver dependable branch-circuit overcurrent and short-circuit protection for panelboards and load centers. Designed to support safer, more reliable electrical distribution in demanding environments, this device combines compact framing with precise protection to keep systems running smoothly.

• Compact molded case design maximizes panel space, making it easier to fit additional circuits and keep enclosure layouts clean and organized.
• Thermal-magnetic trip unit provides stable, repeatable protection by combining thermal overload sensing with instantaneous magnetic trip during short circuits, reducing nuisance trips and equipment damage.
• OEM-compatible compatibility engineered to drop into matching Eaton OEM load centers and panelboards, simplifying installation, replacement, and future expansions.
• Three-pole construction delivers balanced protection for three-phase systems up to 600 V, helping protect motors, compressors, and other three-phase equipment from simultaneous phase faults.

Ideal applications and who benefits

Perfect for residential, commercial, and light industrial settings where reliable protection of branch circuits is essential. Use the KDB3300 to safeguard feeders and branch circuits that power motors, lighting racks, HVAC equipment, and control circuits within panelboards and load centers. Its three-pole design is especially advantageous in new installations or panel upgrades that span three-phase systems, ensuring coordinated protection across all phases.

Technical snapshot

• Manufacturer: Eaton
• Part Number: KDB3300
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 300 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Why choose the KDB3300 over other options

Beyond its core protection capabilities, the KDB3300 is designed for practical, real-world use in panel systems. Its compact form saves valuable enclosure space, while its thermal-magnetic trip unit delivers predictable responses across temperature variations, which translates to fewer unexpected trips and steadier operation of connected equipment. Because it’s compatible with matching OEM load centers and panelboards, you can achieve a cleaner retrofit or upgrade path without adapters, substitutions, or complicated rewiring.

Practical tips for installation and use

• Verify panelboard compatibility with Eaton OEM components to ensure a seamless fit and reliable performance.
• Plan circuit layouts with future expansion in mind; the KDB3300’s 3-pole design supports scalable three-phase protections as your system grows.
• Follow standard electrical safety practices during installation. Ensure power is isolated and the work is performed by a licensed electrician familiar with panelboard protections.

Value in everyday electrical protection

Whether you’re upgrading an aging panel, designing a new commercial installation, or outfitting a light industrial distribution system, the Eaton KDB3300 delivers robust overcurrent and short-circuit protection with intelligent space utilization. Its combination of compact sizing, reliable thermal-magnetic protection, and OEM-panel compatibility makes it a sensible, durable choice for safeguarding critical circuits and maintaining steady, safe operation across a range of applications.