Eaton | LDB3400W | Circuit Breaker | 400A | 3-Pole

Introducing the Eaton LDB3400W circuit breaker — a robust 400 A, 3-pole protective device designed for demanding electrical systems. Built for maintenance, retrofit, and replacement projects where exact specifications matter, this breaker keeps your three-phase distribution running with precise, dependable protection.

Key details at a glance

• Amperage: 400 A
• Pole configuration: 3-Pole (three-phase)
• Part reference: LDB3400W

Why choose the Eaton LDB3400W? This breaker is purpose-built for scenarios where compatibility is non-negotiable. Rely on the LDB3400W as the best reference when matching replacement breakers to an existing system, helping you maintain protective coordination and system reliability with minimal downtime.

Who needs it: electrical engineers, facilities managers, and contractors responsible for commercial or industrial electrical distribution. It’s ideal for service panels and feeders that require a sturdy 400-amp, three-pole solution.

How it solves common problems

• Replacement without guesswork: rely on the exact part number to ensure a correct fit in Eaton-compatible panels.
• Safe, predictable protection for high-current three-phase circuits.
• Streamlined retrofits and upgrades for existing infrastructure, preserving protective coordination.

Shopping tips — Always confirm fit and ratings before ordering to avoid compatibility issues. The part number LDB3400W is the most reliable reference for compatibility.

Designed by Eaton, a trusted name in electrical distribution, the LDB3400W 400A 3-Pole circuit breaker delivers dependable performance for ongoing operations, upgrades, or new installations where precise specifications matter. Whether updating an industrial panel, expanding a facility’s electrical capacity, or replacing a failed breaker, this unit provides a straightforward, specification-aligned solution linked to the exact part number.