Eaton | LD3400Y | Circuit Breaker | 400A | 3-Pole | 600V

Eaton LD3400Y Circuit Breaker — a rugged 400A, 3-pole protection device designed for demanding electrical systems. With a 600V rating, this breaker delivers reliable overcurrent protection for commercial and industrial applications, helping safeguard equipment and maintain uptime.

Engineered for maintenance, retrofit, and replacement projects, the LD3400Y is a precise, compatible fit when you need to match existing panel specifications. When compatibility matters most, rely on the part number LD3400Y as the definitive reference to ensure seamless integration with your current infrastructure.

Key specifications

• Amperage: 400 A
• Poles: 3-Pole
• Voltage: 600 V
• Part number: LD3400Y

Why choose the Eaton LD3400Y for your panel

Unlike generic substitutes, this Eaton circuit breaker is built to align with your existing 3-pole, 400A, 600V configurations. Its design supports dependable fault interruption, helping protect downstream equipment, improve safety, and minimize unplanned outages in demanding environments.

Ideal use cases

• Replacing a failed or worn-out 400A, 3-pole breaker in industrial or commercial panels
• Retrofit projects where existing systems require exact LD3400Y compatibility
• Maintenance cycles that demand durable, long-life protection for high-load circuits

Installation and compatibility notes

Before ordering, confirm that your panel and bus design accommodate a 400 A, 3-Pole, 600 V device. The LD3400Y is specified to be the best compatibility reference, so using the exact part number helps ensure proper fit, ratings, and safe, compliant operation. Engage a qualified electrician for installation and verification of electrical clearances, torque specs, and labeling as part of your routine maintenance and protective-device strategy.

With the Eaton LD3400Y, you gain a reliable, standards-aligned solution that fits your existing infrastructure, supports critical loads, and simplifies procurement by anchoring your choice to a precise, widely recognized part reference.