Westinghouse | MCC3400 | Circuit Breaker | 400A | 3-Pole | 600V

Protect demanding three-phase environments with the Westinghouse MCC3400 circuit breaker. This robust unit is built for heavy-duty service, delivering dependable overcurrent protection for industrial and commercial panels. With a 400A rating across 3 poles and a 600V maximum, it’s designed to keep your power distribution safe, stable, and compliant under demanding load conditions.

Key specifications

• Amperage: 400A
• Poles: 3-Pole
• Voltage rating: 600V
• Part reference: MCC3400
• Applications: maintenance, retrofit, and replacement where exact specs are required

Why this MCC3400 circuit breaker stands out

• : The MCC3400 part number is the most reliable reference when matching against existing panels or replacement kits, reducing guesswork during upgrades.
• three-pole design: Ideal for three-phase systems, providing balanced protection and simplifying panel wiring arrangements.
• 600V capability: Suitable for modern industrial distribution networks that operate at higher voltage levels while maintaining safety margins.

Ideal use cases

• Maintenance: keep critical equipment powered reliably while performing routine service on your electrical distribution.
• Retrofit projects: upgrade legacy systems to current specifications without overhauling entire panels.
• Replacement needs: swap in a like-for-like MCC3400 unit to restore original protection characteristics and behavior.

Compatibility and installation tips

Before ordering, verify fit and ratings against your existing equipment. The MCC3400 is most accurately matched using the part number as the primary reference for compatibility. When installing, ensure the panel and conductors are rated for 400A and 600V, and confirm the three-pole configuration aligns with your bus arrangement and enclosure design.

Practical guidance for safer, longer-lasting protection

• Keep a spare MCC3400 on hand for planned maintenance and rapid replacement to minimize downtime.
• Reference system documentation and the equipment’s original specifications to confirm interrupting capacity and trip characteristics match your protection strategy.
• Follow all applicable safety standards and local electrical codes during installation and servicing to ensure compliant operation.