Eaton | MD3300W | Circuit Breaker | 300A | 3-Pole | 600V

Upgrade or maintain your three-phase power distribution with the Eaton MD3300W Circuit Breaker. This 300A, 3-Pole, 600V device is built for reliability in demanding environments, delivering precise trip performance and a straightforward replacement option when exact specifications are required.

Designed for applications where matching specifications matters, this MD3300W model is the clear choice for maintenance, retrofit, and replacement projects. The part number MD3300W serves as the best reference for compatibility, helping you avoid mis-match in panel boards, switchgear, and 3-phase distribution systems.

Key specifications

• Amperage: 300 A
• Poles: 3-Pole (three-phase)
• Voltage rating: 600 V
• Configuration: 3-Pole for standard three-phase protection

Why this matters

In three-phase power networks, the MD3300W ensures synchronized, coordinated protection across all three lines. With a 600V rating, it provides robust fault clearing to minimize downtime and protect motors, drives, and other equipment from damaging faults. Using the official MD3300W model as your reference guarantees that your replacement integrates with existing Eaton equipment and bus connections without the need for adapters or workarounds.

Ideal use scenarios

• Maintenance: replace worn-out or tripped units in 3-phase distribution panels requiring 300A protection
• Retrofit: upgrade legacy systems to a modern MD3300W-rated breaker with three-pole protection
• Replacement: source a direct MD3300W substitute when a part number is specified

Compatibility and ordering notes

Important: Confirm fit and ratings before ordering. The MD3300W part number is the best reference for compatibility, ensuring the device matches your panelboard, switchgear, and wiring configuration.

With the Eaton MD3300W, you’re choosing a purpose-built solution for reliable three-phase protection at up to 600V. It’s a concrete, specification-driven option for projects that demand precision, compatibility, and straightforward sourcing in electrical maintenance and upgrades.