Eaton KDB3300Y - 300 A, 600 V, 3-Pole Circuit Breaker | AmpState

The Eaton KDB3300Y is a 300A, 600V, 3-pole molded case circuit breaker designed to deliver dependable branch circuit protection in panelboards and load centers. Built for reliability in demanding environments, this breaker ensures overcurrent and short-circuit protection with precision and consistency, keeping electrical systems safe and available when it matters most.

• Compact molded case design maximizes panel space, enabling cleaner installations and easier consolidation in crowded panels.
• Thermal-magnetic trip unit delivers stable, repeatable protection by responding to both gradual overloads and high-current faults, reducing nuisance trips and protecting wiring and devices.
• 3-pole configuration with 300A rating provides robust, coordinated protection for three-phase systems or multi-wire branch circuits.
• 600V rating supports a wide range of commercial and light industrial applications, offering versatile protection for higher voltage distributions.
• OEM-grade compatibility engineered to pair with matching Eaton panelboards and load centers, ensuring seamless integration and reliable performance.
• Versatile applications suitable for residential, commercial, and light industrial environments where consistent protection and space efficiency are top priorities.

Why this matters for your project: the KDB3300Y's combination of a compact form factor and a thermal-magnetic trip unit means you can protect critical branch circuits without sacrificing room in the enclosure. It’s a practical choice for installers who need a dependable, easy-to-specify solution that aligns with Eaton’s panel systems, helping you reduce inventory variety while maintaining consistent protection performance.

Key specifications

• 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
• Manufacturer: Eaton
• Part number: KDB3300Y

Practical guidance for use

• Configure this breaker within compatible Eaton panelboards and load centers to ensure reliable trip coordination and protection.
• Pair with appropriately rated conductors and protection schemes to match the 300A, 600V capacity and three-pole configuration.
• Schedule routine inspections of enclosure cleanliness and mounting integrity to preserve performance in residential, commercial, or light industrial settings.
• Keep spare KDB3300Y units on hand for fast replacement and minimal downtime during maintenance or panel upgrades.

Whether you’re upgrading an existing panel or specifying a replacement for a new build, the Eaton KDB3300Y delivers focused protection where you need it most—efficiently, reliably, and in harmony with Eaton’s family of panel products. It’s a solid, purpose-built choice for professionals who value precise protection, space efficiency, and straightforward compatibility.