Eaton | LDB3400X | Circuit Breaker | 400A | 3-Pole | 240V

Meet the Eaton LDB3400X Circuit Breaker — a purpose-built solution for heavy-duty 3-phase power distribution. With a 400A rating, a 3-Pole configuration, and a 240V operating footprint, it’s engineered for maintenance, retrofit, and replacement projects where exact specifications matter and uptime is critical.

• Amperage: 400A
• Poles: 3-Pole
• Voltage: 240V
• Reference: Part number LDB3400X is your best guide to compatibility

Notes: Confirm fit and ratings before ordering. The part number is the best reference for compatibility with Eaton panels and other equipment designed for 400A, 3-phase service.

• Triple-phase protection: The 3-Pole design ensures all three conductors trip together, safeguarding against unbalanced loads and enhancing safety in 3-phase circuits.
• Commercial and industrial readiness: Ideal for feeders and main distribution in warehouses, factories, data centers, and large offices that rely on 240V 3-phase infrastructure.
• Streamlined retrofit: Replacing an aging breaker or upgrading an existing panel is smoother when you match the LDB3400X specification, reducing downtime and compatibility issues.
• Precise compatibility: Rely on the part number LDB3400X to verify fit; avoid guesswork in panel matching.

Use cases include retrofitting legacy 3-phase panels, upgrading to 400A service feeders, and performing safe maintenance in 3-phase 240V systems. This Eaton breaker is tailored for professionals who need reliable, code-compliant protection without sacrificing system performance.

Installation and safety should be handled by a licensed electrician. Verify that your panel is rated for 400A, 3-Pole, 240V operation and that the bus, mounting style, and termination method align with Eaton’s LDB3350-series family requirements. When in doubt, reference the exact part number LDB3400X to ensure a precise fit and dependable protection.

Choose the Eaton LDB3400X for a precise, reliable solution that protects large, three-phase circuits and keeps your critical equipment safeguarded with accurate, compliant circuit protection.