Eaton HKD3350X 350A 600V 3-Pole Circuit Breaker

Discover the Eaton HKD3350X, a 350A, 600V, 3-pole bolt-on molded case circuit breaker designed to safeguard critical branch circuits in panelboards and load centers. Its secure bolt-on mounting creates a rigid, vibration-resistant bus connection, delivering dependable performance in environments where equipment movement or vibration is common.

The heart of this breaker is a thermal-magnetic trip unit, which provides stable, repeatable protection by combining thermal overload sensing with magnetic short-circuit sensing. The result is fewer nuisance trips during normal operation and rapid, reliable response when a high-current fault occurs, helping protect conductors, devices, and downstream equipment.

Built for seamless integration, the HKD3350X is compatible with matching OEM load centers and panelboards, making it an ideal upgrade or replacement option that preserves panel integrity and electrical performance. With its 3-pole configuration, it is suited for three-phase feeder protection and main distribution paths in commercial and light industrial setups, while still meeting the needs of demanding residential applications that require higher current capabilities.

Key benefits and scenarios

• Secure bolt-on mounting: A solid connection that minimizes movement and wear on the bus, enhancing reliability in fluctuating or vibration-prone installations.
• Thermal-magnetic protection: Precise coordination between overload protection and instantaneous short-circuit response for safer, more predictable operation.
• OEM-compatible: Designed to pair with Eaton’s matching OEM load centers and panelboards for straightforward retrofits and optimized system performance.
• High-current, three-phase capability: 350A rating at up to 600V supports substantial branch circuits in commercial and light-industrial environments.
• Practical installation and maintenance: Molded-case construction and bolt-on mounting simplify upgrades in existing panels without sacrificing reliability.

Technical snapshot

• Manufacturer: Eaton
• Part number: HKD3350X
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 350 A
• Voltage rating: 600 V
• Number of poles: 3
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Choose the Eaton HKD3350X when you need a dependable, high-capacity protection solution that aligns with OEM panels, delivers consistent trip performance, and stands up to the demands of three-phase distribution in commercial and light-industrial environments. This breaker is built to protect your wiring and equipment while simplifying installation and long-term maintenance for electricians and facility managers alike.