Eaton HKD3350Y - 350 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

The Eaton HKD3350Y is a robust, three-phase bolt-on molded case circuit breaker built to safeguard large branch circuits in panelboards and load centers. With a 350A rating and a 600V insulation capability, this unit delivers dependable overcurrent and short-circuit protection where it matters most—in demanding commercial and light industrial environments as well as resilient residential setups that require higher ampacity distribution.

Why the HKD3350Y stands out:

• Secure bolt-on mounting provides a rigid, vibration-resistant connection to the bus, reducing looseness and ensuring consistent electrical contact even in installations subject to vibration or movement.
• Thermal-magnetic trip unit combines thermal protection for overload conditions with magnetic instantaneous response for short circuits, delivering stable, repeatable protection you can rely on under varying loads.
• OEM-compatible design engineered to pair seamlessly with matching Eaton loadcenters and panelboards for straightforward upgrades, expansions, or replacements without compatibility concerns.
• High-current capability 350A rating supports substantial feeders and branch circuits, enabling fewer devices for larger circuits while maintaining precise protection characteristics.
• 600V rating aligns with common commercial and industrial power distribution networks, offering solid insulation and safety margins for today’s electrical systems.

Technical snapshot

• Manufacturer: Eaton
• Part Number: HKD3350Y
• Type: Thermal-magnetic molded case circuit breaker
• Amperage: 350A
• Voltage: 600V
• Poles: 3
• Mounting Style: Bolt-on
• Applications: Branch circuit overcurrent and short-circuit protection

Ideal use scenarios

• New installations in commercial panelboards where high-current distribution is needed without sacrificing protection quality.
• Retrofitting existing panels that require a rugged, compatible 3-pole solution for three-phase circuits.
• Light industrial electrical rooms where vibration resistance and durable bolt-on mounting prevent connection faults over time.
• Residential-commercial hybrids where large feeders demand reliable thermal-magnetic protection and straightforward integration with OEM panels.

Practical benefits you’ll notice

• Fewer nuisance trips thanks to precise trip curves that respond appropriately to overload and short-circuit events.
• Enhanced service reliability in environments with mechanical vibration or movement, thanks to secure mounting.
• Streamlined maintenance and stocking with OEM-compatible design—simplifies inventory management and reduces downtime during replacements.
• Clear, durable protection for demanding three-phase circuits, reducing the risk of electrical faults cascading through the distribution system.

Whether you’re upgrading a panelboard in a commercial space, expanding a load center for a new project, or replacing aged protection devices in a light industrial setting, the Eaton HKD3350Y delivers the high-current, reliable protection you need with installation that’s as straightforward as it is dependable. Choose HKD3350Y for a resilient, long-lasting solution that aligns with your Eaton-compatible infrastructure and delivers predictable performance under real-world conditions.