Eaton LD3300 - 300 A, 600 V, 3-Pole Circuit Breaker | AmpState

Meet a robust solution for reliable power protection: the Eaton LD3300—300 A, 600 V, 3-pole molded case circuit breaker. Engineered to sit neatly in panelboards and loadcenters, this MCCB is built to handle demanding commercial and light-industrial environments while staying compact enough to maximize panel space. In AmpState's catalog, the Eaton LD3300 is a trusted choice for engineers and electricians seeking dependable branch circuit protection.

What sets the LD3300 apart?

• Compact molded case design saves valuable panel space without sacrificing performance.
• Thermal-magnetic trip unit delivers stable, repeatable protection: thermal for normal overloads and magnetic for high-energy faults, ensuring fast disconnection when it matters most.
• 3-pole configuration supports three-phase circuits, ideal for commercial equipment, conveyor systems, and distributed power in offices and light manufacturing.
• 300 A, 600 V rating designed for branch circuit protection in medium to large loads and feeders; suitable for residential, commercial, and light industrial applications.
• OEM-compatible designed to pair with matching Eaton OEM loadcenters and panelboards for a dependable, integrated protection system.

Key use cases and scenarios

• Replacing aging or worn-out breakers in panelboards serving commercial offices or small data rooms with a single, trusted Eaton solution.
• Feeding high-demand equipment from a central service panel in light industrial facilities where a consistent 3-phase protection profile is essential.
• Upgrading residential or small commercial loadcenters to modern, coordinated protection by installing a 3-pole breaker that matches the panel’s design and bus configuration.

Technical snapshot at a glance

• Manufacturer: Eaton
• Part Number: LD3300
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 300 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Practical tips for installation and long-term reliability

• Ensure the breaker is used with matching Eaton loadcenters or panelboards to guarantee a proper fit, bus alignment, and mechanical interlock compatibility.
• Plan for future expansion: a 3-pole design provides the groundwork for adding or upgrading 3-phase loads without changing the protection strategy.
• Follow standard electrical safety practices during installation; verify that circuits are de-energized and locked out before service work.

Whether you’re equipping a new commercial space, upgrading a service panel in a light-industrial setting, or refreshing a residential loadcenter with more capable protection, the Eaton LD3300 delivers dependable, space-efficient, three-pole protection you can trust.