Eaton HKD3350C - 350 A, 600 V, 3-Pole Circuit Breaker | AmpState

Introducing the Eaton HKD3350C—a 350A, 600V, 3-pole molded case circuit breaker built to safeguard panelboards and load centers from overcurrent and short circuits. This compact unit is designed for residential, commercial, and light-industrial environments where safe, predictable protection matters.

Why the HKD3350C stands out

• Compact molded-case design: minimizes panel footprint while leaving room for additional circuits, easier wiring, and neater installations.
• Thermal‑magnetic trip unit: delivers stable, repeatable protection across a wide range of loads. Thermal protection handles gradual overloads; magnetic protection responds instantly to high faults.
• Three-pole architecture: ensures coordinated, simultaneous interruption on all three phases, preserving system balance in three‑phase panels.
• OEM compatibility: engineered to pair with matching Eaton OEM load centers and panelboards for reliable fit and electrical performance.
• Versatile applications: ideal for branch circuit protection in residential, commercial, and light‑industrial installations up to 600V.

Key specifications at a glance

• Amperage rating: 350 A
• Voltage rating: 600 V
• Number of poles: 3
• Type: Thermal-magnetic molded case circuit breaker
• Part number: HKD3350C

Practical use scenarios

In a three‑phase panel, the HKD3350C serves as a robust main or feeder protection device for critical loads. It’s well-suited for:

• New installations in commercial or light‑industrial panelboards needing dependable 350A distribution across three phases.
• Replacing aging or underperforming breakers in OEM load centers where fit and trip characteristics must align precisely with existing equipment.
• Feeding motors, HVAC, pumps, and other high‑inrush equipment where controlled, fast interruption protects wiring and downstream devices.

Installation and compatibility tips

To ensure optimal performance, pair the HKD3350C with compatible Eaton load centers or panelboards. Verify that the panel’s bus design and mounting footprint align with this 3‑pole molded case breaker, and follow standard wiring practices for three‑phase protection. Because of its thermal‑magnetic trip, it adapts to both steady loads and short‑circuit events, helping you minimize downtime and equipment damage.