Eaton | MD3300 | Circuit Breaker | 300A | 3-Pole | 600V

Protect your three-phase 600V electrical systems with confidence using the Eaton MD3300 300A, 3-Pole Circuit Breaker. Designed for reliability in maintenance, retrofit, and replacement projects, this unit ensures your Eaton-compatible panels and switchgear continue to operate with precise protection when it matters most.

Key specifications at a glance

• Amperage: 300A
• Poles: 3-Pole (three-phase protection)
• System voltage: up to 600V
• Reference part number: MD3300

Why choose the MD3300 for your installation?

• Exact fit and compatibility: The MD3300 is the best compatibility reference for Eaton panels, switchgear, and distribution systems that require this specific device. Use the part number MD3300 to verify you’re selecting the correct replacement or retrofit component.
• Maintenance, retrofit, and replacement ready: Whether upgrading an older panel, refreshing a service fleet, or replacing a failed breaker, this 3-pole, 300A unit is sized for robust three-phase protection in demanding environments.
• Engineered for Eaton ecosystems: Built to align with Eaton’s design standards, ensuring straightforward installation, consistent performance, and reliable electrical protection in compatible equipment.
• Clear, practical use in real-world settings: Ideal for industrial distribution panels, control cabinets, and service entrances where a 300A, 3-Pole breaker rated for 600V is specified.

How this fits into your project planning

• Use case scenarios: Retrofit projects to restore full protection in legacy panels, stock replacement for maintenance fleets, or new installations in 600V three-phase circuits needing dependable 300A protection.
• Installation considerations: Before ordering, verify that your equipment requires an MD3300-series breaker and that the ratings (300A, 3-Pole, 600V) match your system requirements.
• Buying with confidence: The part number MD3300 is the most reliable reference for compatibility—pair it with the exact Eaton enclosure or panel specification to minimize fit issues.

Equip your electrical distribution with a trusted Eaton solution tailored for precise three-phase protection. The MD3300 delivers the disciplined performance you expect in industrial environments, backed by Eaton’s engineering heritage and a clear path to smooth retrofits and replacements. Important note: confirm fit and ratings before ordering—the MD3300 part number is your best reference for compatibility.