Eaton HLD3300Y - 300 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Meet the Eaton HLD3300Y — a rugged, three-pole bolt-on molded case circuit breaker engineered to deliver dependable protection for demanding electrical environments. With a 300 A rating and a 600 V capacity, this device is built to safeguard branch circuits in panelboards and load centers across residential, commercial, and light industrial settings.

Key advantages

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, helping maintain consistent electrical contact in installations subject to movement or vibration.
• Thermal-magnetic trip unit delivers stable, repeatable protection performance, reliably responding to overcurrent conditions and quickly interrupting fault currents to minimize damage.
• Three-pole configuration is ideal for balanced protection in 3‑phase systems, ensuring all phases are protected simultaneously.
• OEM-compatible design is engineered to work with matching OEM load centers and panelboards, simplifying upgrades, replacements, and serviceability.
• Durable molded case construction stands up to the rigors of everyday electrical usage in a range of applications, from service panels to distribution boards.

Protection you can rely on

• Provides robust branch circuit overcurrent protection to prevent wiring insulation damage and nuisance trips during normal operation.
• Offers effective short-circuit protection to quickly interrupt fault currents, reducing the risk of equipment damage and fire hazards.

Technical specifications

• Manufacturer: Eaton
• Part Number: HLD3300Y
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 300 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal applications and use cases

• Residential panelboards where reliable 3‑phase protection is required for future expansion or equipment upgrades.
• Commercial distribution panels that demand secure mounting and consistent trip performance in busy electrical rooms.
• Light industrial settings needing durable protection for motors, conveyors, or other 3‑phase loads.

Why this matters in your electrical system

The Eaton HLD3300Y combines a high-current rating with a solid bolt-on connection, meaning fewer loose-contact risks and more reliable operation in environments prone to vibration or movement. The thermal-magnetic trip mechanism delivers precise, predictable protection, helping you avoid nuisance trips while providing rapid fault interruption when a real fault occurs. When paired with compatible OEM panelboards and load centers, it delivers a cohesive protection solution that simplifies procurement, installation, and ongoing maintenance.