Eaton | HLDB3400Y | Circuit Breaker | 400A | 3-Pole | 600V

Eaton HLDB3400Y Circuit Breaker — a robust 400A, 3-pole, 600V protection device engineered for demanding electrical installations. Designed for maintenance, retrofit, and replacement projects where exact specifications matter, the HLDB3400Y delivers reliable overcurrent protection across three phases. Its 400A rating is ideal for protecting feeders and motors in mid- to high-load commercial and industrial environments, while the 600V maximum voltage rating ensures safe operation within typical power distribution settings. Key advantages - Precise three-phase protection: Three-pole configuration guards all lines in a 3-phase system, promoting balanced protection across your equipment. - High-current capability: 400A rating supports demanding circuits without compromising safety or reliability. - Retrofit-friendly: Specifically suited for upgrading or replacing existing protection in panels that require this exact Eaton specification. - Compatibility anchor: The part number HLDB3400Y is the best reference for confirming compatibility with your current Eaton equipment and panel lineup. Use cases and ideal applications - Industrial facilities with heavy machinery draws: feeders, motors, and distribution circuits that demand solid, dependable protection. - Commercial power distribution upgrades: modernize panels and feeders while preserving electrical characteristics and safety margins. - Retrofit and maintenance projects: replace aging or failed breakers with a drop-in solution that aligns with existing specs and infrastructure. What to know before you buy - Compatibility note: Confirm fit and ratings before ordering. The HLDB3400Y is your best reference to ensure the breaker matches your panel and system requirements. - Practical installation context: Use this breaker in environments that require consistent three-phase protection at 600V, and plan for routine maintenance and periodic inspection as part of your electrical safety program. In short, the Eaton HLDB3400Y is designed for professionals who need a reliable, high-capacity circuit breaker that fits precise specifications for retrofit, replacement, or maintenance projects. It delivers clear, tangible protection for multi-phase power systems, helping keep critical equipment running smoothly and safely.