Eaton MDL3300 - 300 A, 600 V, 3-Pole Circuit Breaker | AmpState

Meet the Eaton MDL3300 300A, 600V, 3-Pole molded case circuit breaker—a purpose-built solution from AmpState designed to protect your panelboards and load centers with precision and reliability. Built for dependable branch circuit overcurrent and short-circuit protection, it’s a smart upgrade for both new installations and replacements in demanding electrical environments.

• Compact molded-case design: Maximizes panel space, making it easier to fit alongside other breakers and feeders without crowding the enclosure.
• Thermal-magnetic trip unit: Delivers stable, repeatable protection by responding to both overload and short-circuit conditions, reducing nuisance tripping and improving system reliability.
• 3-pole construction: Suited for 3-phase systems, common in commercial and light industrial settings, while still appropriate for residential applications that require 3-phase protection.
• OEM compatibility: Designed to pair with matching Eaton OEM load centers and panelboards, ensuring straightforward replacement and consistent performance in existing installations.
• High-current capability: Rated at 300A and capable of withstanding up to 600V, providing robust protection for main or feeder circuits in larger electrical systems.

Who benefits most: electrical contractors, facilities managers, and service technicians who need reliable, compatible protection for panelboards and load centers in commercial, residential, and light industrial projects. If you’re upgrading an existing Eaton or OEM-compatible panel, the MDL3300 offers a seamless fit with predictable protection characteristics you can trust.

Why this matters in real-world use: In busy electrical rooms, space, reliability, and compatibility are everything. The MDL3300’s compact form saves valuable panel real estate, the thermal-magnetic trip unit reduces both nuisance trips and downtime, and its OEM compatibility means fewer wiring changes and faster installs. Whether you’re protecting main feeders or supporting critical branch circuits, this breaker maintains consistent performance across a range of loads and fault conditions.

Practical tips for deployment:

• Confirm that your panelboard is designed for 3-pole, 300A breakers and supports 600V operation.
• Verify that the MDL3300 matches your OEM load center’s part family to ensure a proper fit and coordinated protection scheme.
• When replacing an existing breaker, note the trip characteristics you’re replacing and ensure the thermal-magnetic unit aligns with the protection needs of the circuit.
• Label protected circuits clearly and keep documentation for future maintenance or upgrades.

Technical specifications at a glance:

• Manufacturer: Eaton
• Part Number: MDL3300
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 300A
• Voltage Rating: 600V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Choose the Eaton MDL3300 for a robust, space-efficient, and OEM-compatible protection solution that keeps residential, commercial, and light industrial electrical systems running smoothly. Reliable protection starts with the right breaker—and this 3-pole model from AmpState is built to deliver.