Westinghouse HMDL3300 Circuit Breaker, 300A, 3-Pole, 600V

The Westinghouse HMDL3300 circuit breaker is engineered for demanding industrial electrical service, maintenance, and replacement projects. Delivering a robust 300 A rating across a three-pole design, it provides reliable protection for three-phase power systems up to 600 V. To ensure seamless integration, verify compatibility using the part number HMDL3300 and confirm it matches your specific application requirements.

Key Specifications

• Manufacturer: Westinghouse
• Part Number: HMDL3300
• Product Type: Circuit Breaker
• Amperage: 300 A
• Poles: 3
• Voltage Rating: 600 V

Why this breaker stands out

Designed for reliability in industrial environments, the HMDL3300 emphasizes straightforward compatibility and dependable protection for three-phase circuits. Its 3-pole configuration ensures balanced protection across all phases, helping prevent uneven loading and potential equipment damage. The 600 V rating supports common industrial distribution setups, making it a practical choice for main feeders, switchgear, and service equipment in facilities that require solid overcurrent protection with minimal downtime.

Ideal Uses & Scenarios

• New installations or upgrades in industrial facilities where three-phase protection is required
• Maintenance and replacement projects for service panels and distribution equipment
• Applications needing a clearly identified part number-based fit check to ensure compatibility with existing gear

Compatibility & Installation Considerations

Because electrical systems vary, always verify fitment by cross-referencing the part number with your equipment’s requirements. This breaker is intended for industrial service contexts and should be installed by qualified personnel following all safety standards. If you’re unsure about compatibility, you can reach out for expert assistance to confirm that HMDL3300 matches your panel, switchgear, or replacement plan.

What sets it apart in practice

Beyond its basic specs, the HMDL3300 emphasizes practical, real-world fit and long-term reliability in challenging environments. This means fewer unexpected replacements, clearer maintenance documentation, and smoother project timelines when upgrading or maintaining three-phase distribution systems. Its straightforward 3-pole, 300 A, 600 V profile simplifies selection for facilities engineers and maintenance teams working to keep critical infrastructure energized and protected.

If you need help matching a part number or confirming compatibility with your specific setup, send us a message and we’ll assist in identifying the right fit based on your application requirements.