Schneider Electric | LJL36400U43XLY | Circuit Breaker | 400A | 3-Pole

For electricians and facility managers tackling panel maintenance or upgrades, the Schneider Electric LJL36400U43XLY circuit breaker delivers exacting reliability in a 400A, 3-pole configuration. Built for maintenance, retrofit, and replacement projects, this unit ensures you stay within the intended electrical specs of your Schneider Electric system.

Why this part matters — When you need a precise fit that matches your panel label and circuit rating, the LJL36400U43XLY is the clear choice. The part number is the best reference for compatibility, so you can order with confidence and minimize downtime.

• Amperage: 400A
• Pole configuration: 3-Pole
• Part number: LJL36400U43XLY
• Best use cases: Maintenance, Retrofit, Replacement in Schneider Electric panel systems

Who should consider this breaker? Ideal for facilities with Schneider Electric distribution panels that require a high-current, three-pole solution. It suits commercial spaces, light industrial environments, and any installation where a robust 400A protection device is needed to guard feeders and main circuits.

How it helps you operate with confidence — By matching the exact specifications of your existing panel, this breaker minimizes compatibility risks that can arise with aftermarket substitutes. Retrofit projects become smoother when you have a proven, brand-aligned component from Schneider Electric.

Installation notes and tips — Before ordering, confirm fit and ratings against your panel’s documentation. Use the part number LJL36400U43XLY as the primary reference. If you’re replacing an older unit, ensure the mounting and trip characteristics align with your system requirements and that wiring methods comply with local electrical codes.

Ready for installation? This 3-pole, 400A circuit breaker is designed to integrate with Schneider Electric panels that support the LJL series, delivering dependable overcurrent protection for high-demand circuits while maintaining system-wide reliability and safety. Keep it as part of your critical spare inventory to reduce downtime during scheduled maintenance or unexpected outages.