Eaton HKD3400Y - 400 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Meet the Eaton HKD3400Y — a 400 A, 600 V, 3-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit protection in panelboards and load centers. Built for real-world demand, it helps keep electrical systems safe, powered, and ready for growth.

Key advantages you’ll notice in everyday installations:

• Secure bolt-on mounting provides a rigid, vibration‑resistant bus connection, helping maintain consistent electrical contact even in environments with equipment vibration or heavy loads.
• Thermal-magnetic trip unit delivers stable, repeatable protection against overcurrent and short-circuit faults across varying temperatures and load conditions.
• 3-pole configuration is ideal for 3‑phase circuits, supporting larger commercial and light industrial feeders without compromising protection quality.
• 600 V rating and molded‑case construction offer reliable insulation and safety for standard commercial and industrial power distribution scenarios.
• OEM compatibility pairs seamlessly with matching Eaton load centers and panelboards, ensuring plug‑and‑play installation and streamlined panel upgrades.

Where it fits

Designed for residential, commercial, and light industrial applications, the HKD3400Y is an option for panelboards and load centers that require robust branch circuit overcurrent and short-circuit protection. It’s a practical choice when you need a high‑capacity breaker that won’t compromise on safety or reliability in demanding electrical deployments.

Technical snapshot

• Manufacturer: Eaton
• Part Number: HKD3400Y
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 400 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Why choose this breaker? It combines robust mechanical mounting with precise protection logic, making it a reliable choice for electricians and panel builders who value performance and consistency. When you install the HKD3400Y, you’re equipping your distribution system with a trusted Eaton solution that complements compatible panelgear and supports steady, trouble-free operation even as your electrical demands evolve.