Eaton | KDC3400Y | Circuit Breaker | 400A | 3-Pole | 600V

Meet the Eaton KDC3400Y circuit breaker—a purpose-built solution for keeping 3-phase electrical systems safe and operational. With a 400A rating and 3 poles, it is designed for 600V environments, making it suitable for industrial panels, distribution setups, and service equipment that require a precise match to Eaton's protection architecture.

Why this model stands out

• Exact compatibility with Eaton power distribution systems via the KDC3400Y designation — the part number is the best reference for ensuring a proper fit and correct ratings.
• Robust 400A current handling for heavy loads across three phases, helping prevent nuisance trips while safeguarding equipment.
• Three-pole design supports three-phase power distribution up to 600V, ideal for factory floors, data centers, and commercial machinery.
• Maintenance, retrofit, and replacement ready — a practical, long-term spare that keeps your electrical infrastructure aligned with current specs.

Key specifications

• Amperage: 400A
• Poles: 3-Pole
• Voltage: 600V

What problems does it solve?

This circuit breaker provides reliable protection for high-demand, three-phase circuits. It helps minimize unplanned downtime by ensuring that heavy loads are interrupted safely when fault or overload conditions occur, and it aligns with Eaton's established protective framework for consistent performance across compatible panels and equipment.

Practical guidance for selection and installation

• Before ordering, verify fit and ratings against your panel or distribution board. Use the KDC3400Y part number as the principal reference to confirm compatibility.
• Plan for routine maintenance and spare parts strategy by stocking this Eaton model for replacements in systems that demand precise spec matching.
• Engage a qualified electrician to ensure proper mounting, electrical clearance, and adherence to local electrical codes during installation and service.

Choose the Eaton KDC3400Y when you need a dependable 400A, 3-pole, 600V circuit breaker that integrates smoothly into existing Eaton protection schemes and keeps critical, three-phase equipment safeguarded.