Westinghouse | MC3400 | Circuit Breaker | 3-Pole

Westinghouse MC3400 3-Pole Circuit Breaker is a purpose-built solution for maintenance, retrofit, and replacement projects where precise specifications matter. This 3-Pole device is designed to fit panels that require a Westinghouse-style breaker and provides reliable protection for multi-wire circuits, keeping your electrical system aligned with the original design intent.

Key details
Poles: 3-Pole
Part number: MC3400
Applications: maintenance, retrofit, and replacement where matching specs are required
Fitment note: Confirm fit and ratings before ordering—the part number is the best reference for compatibility.

Why choose the Westinghouse MC3400 3-Pole breaker?

• Genuine Westinghouse component designed to align with existing panels that specify MC3400, reducing compatibility risk during replacements.
• 3-Pole configuration provides comprehensive multi-wire protection for circuits that demand a three-pole solution.
• Streamlined replacement path for retrofit projects, helping you restore system protection without unnecessary changes to the panel design.
• Clear, reference-based compatibility approach: using the MC3400 part number as the primary cross-reference minimizes guesswork when sourcing parts.

Ideal use cases

Use the Westinghouse MC3400 3-Pole circuit breaker when servicing electrical panels that require a three-pole protection device and when you need a direct, specification-aligned replacement. It’s well-suited for maintenance windows, retrofit upgrades, and replacement scenarios where exact spec matching matters to safety and performance.

Ordering with confidence

• Verify your panel accepts MC3400 and matches the 3-Pole configuration before purchasing.
• Use the part number MC3400 as the primary reference to confirm compatibility with your panel model and rating requirements.
• Prepare your installation by noting the panel’s documentation to ensure the replacement maintains intended circuit protection and alignment with your system.