Eaton | 504C743G09 | Circuit Breaker | 400A | 3-Pole | 600V

Meet the Eaton 504C743G09 Circuit Breaker—engineered for reliability in demanding electrical environments. With a robust 400A rating, a three-pole configuration, and a 600V maximum, this unit is purpose-built to protect main feeders and distribution panels from overcurrent events while keeping downtime to a minimum.

Key specifications

• Amperage: 400A
• Poles: 3-Pole
• Voltage: 600V
• Part reference: 504C743G09 — use this number as the best compatibility reference
• Fit and availability: Confirm fit and ratings before ordering to ensure it matches your panel and service conditions

Why this Eaton breaker stands out

Designed for maintenance, retrofit, and replacement projects, the 504C743G09 provides seamless integration where exact specifications are required. Its three-pole design supports balanced protection across all phases in three-phase systems, helping to safeguard equipment, wiring, and connected loads from faults. This is a practical, long-term solution for facilities that demand dependable interruption performance without sacrificing compatibility with existing Eaton or compatible panels.

Ideal use scenarios

• Maintenance work on aging or upgraded electrical systems that require a like-for-like 400A, 3-pole, 600V breaker
• Retrofit projects where panel configurations must match precise Eaton specifications
• Replacement in industrial or commercial setups that rely on Eaton’s reliability and coordinated protection strategy

Practical tips for ensuring a smooth upgrade

Start with the part number—504C743G09 is the best compatibility reference. Always verify your panel’s ratings and form factor match the 400A, 3-Pole, 600V profile before purchasing. If you’re replacing an older unit, compare the current breaker’s physical footprint and bus connection layout to confirm a straightforward swap, minimizing downtime and avoiding fit issues.