Eaton KDC3300X - 300 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Introducing the Eaton KDC3300X, a rugged 3-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Engineered for durability and consistent performance, this 300 A, 600 V device stands up to demanding residential, commercial, and light industrial environments.

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection that stays tight through thermal cycling and field conditions.
• Thermal-magnetic trip unit combines precise thermal overload sensing with magnetic instantaneous tripping for fast fault clearance and stable protection performance.
• OEM-compatible design ensures seamless compatibility with matching Eaton OEM load centers and panelboards, simplifying replacements and upgrades.
• Versatile 3-pole configuration supports three-phase systems or main distribution needs in both small and larger installations.
• Wide application range optimized for residential, commercial, and light industrial setups where reliable protection matters most.

Technical snapshot

• Manufacturer: Eaton
• Part Number: KDC3300X
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 300 A
• Voltage Rating: 600 V
• Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Use cases, benefits, and practical insights

In commercial panelboards and load centers, the KDC3300X serves as a reliable main or feeder protection device, helping prevent damage from overloads and short circuits. Its bolt-on design reduces the risk of connection loosening in environments with vibration or movement, making it a solid choice for equipment rooms, service entrances, and compact installations where space and reliability matter.

The thermal-magnetic trip arrangement provides predictable, code-compliant response: overloads are managed with a controlled time delay, while short circuits trigger instantaneous protection. This means fewer nuisance trips during temporary surge events and faster isolation of faults when they occur—crucial for protecting downstream equipment like transformers, motors, and lighting circuits.

If you’re stocking parts for a facility that uses Eaton panels, the KDC3300X offers a straightforward, compatible replacement option that minimizes downtime and simplifies maintenance. It’s a thoughtful choice for projects that require durable, factory-aligned protection without the guesswork of cross-compatibility.

Who is this ideal for?

Electrical contractors, facilities managers, and service technicians working with panelboards and load centers in residential complexes, commercial spaces, and light industrial settings. It’s especially well-suited for installations needing robust, vibration-resistant protection with a clear path to OEM compatibility and streamlined maintenance.

Choose the Eaton KDC3300X when you need dependable 300 A overcurrent and short-circuit protection in a compact, bolt-on package that aligns with Eaton’s OEM systems and delivers consistent protection where it matters most.