Westinghouse | MDL3300 | Circuit Breaker | 3-Pole | 600V

Meet the Westinghouse MDL3300—a reliable, OEM-grade 3-pole circuit breaker rated for 600V designed for maintenance, retrofit, and replacement projects where exact specifications matter. Built to restore safe, controlled interruption in three-phase power systems, this unit delivers the dependable protection your equipment demands.

3-pole protection is essential for balanced, coordinated shutdowns across all three phases, reducing the risk of uneven loads and equipment damage in commercial and industrial environments. With a 600V rating, the MDL3300 is suited for a wide range of distribution panels and switchgear found in medium-duty industrial settings and large facilities, providing a robust barrier between electrical faults and sensitive machinery.

Key value you get with the MDL3300

• Precise compatibility just by part reference — use the MDL3300 as the best reference when matching replacement parts to your existing panel or enclosure.
• Trusted Westinghouse reliability — built to endure frequent switching and fault events, supporting steady operation of critical systems.
• Efficient maintenance and retrofits — ideal for up-fitting older equipment or expanding three-phase protection without changing your infrastructure.
• Clear, actionable fit notes — before ordering, confirm fit and ratings to ensure seamless replacement with your current setup.

Who should consider this breaker

Maintenance teams, facilities engineers, and panel upgrade projects in commercial and industrial environments where three-phase power is standard will find the MDL3300 a practical, trustworthy choice. It’s particularly advantageous when you need an exact-match replacement that aligns with existing Westinghouse or compatible panels and bus configurations.

How to verify fit before you buy

• Ensure your system uses a 3-pole configuration for three-phase protection.
• Confirm the voltage requirement is 600V and that this rating aligns with your distribution panel.
• Use the part number MDL3300 as the primary reference to verify compatibility with your equipment diagrams and replacement history.
• Check mounting and bus-bar interfaces in your enclosure to ensure mechanical compatibility with this model.

With the Westinghouse MDL3300, you’re choosing a practical, purpose-built solution for reliable three-phase protection. It’s not just a part—it’s a strategic component for keeping systems protected, downtime minimized, and maintenance workflows streamlined.