Schneider Electric | LJL36400CU33X | Circuit Breaker | 400A | 3-Pole | 600V

Schneider Electric LJL36400CU33X Circuit Breaker delivers dependable overcurrent protection for demanding electrical systems, combining high amperage handling with solid three-pole operation. With a 400A rating and a 600V maximum, this breaker is built to guard three-phase circuits in industrial and commercial environments where reliable shutdown is essential. Key details - Amperage: 400A - Poles: 3-Pole - Voltage: 600V - Part number: LJL36400CU33X - Brand: Schneider Electric Why this part matters - Exact compatibility matters: the part number LJL36400CU33X is the best reference when sourcing a replacement, retrofit, or maintenance unit to ensure a precise fit with your panel and bus configuration. - Reliable three-phase protection: designed to interrupt current across three phases, helping to prevent fault propagation and protect downstream equipment. - Suitability for retrofit and replacement: ideal for updating aging installations or restoring critical service where matching specs is required, minimizing integration issues and downtime. Use cases and scenarios - Maintenance projects: swap in the LJL36400CU33X to maintain uninterrupted service in existing three-phase distributions without changing panel infrastructure. - Retrofit upgrades: upgrade protection settings in upgrading facilities that operate on up to 600V, ensuring continued compatibility with current electrical standards. - Replacement needs: replacement for panels or systems previously configured for a 400A, 3-pole, 600V protective device, preserving electrical safety and trip characteristics. Who this is ideal for - Facility engineers and maintenance technicians managing industrial or commercial power distribution. - Electrical distributors and system integrators tasked with precise, drop-in replacements for Schneider Electric-compatible panels. - OEMs and panel builders seeking reliable, manufacturer-aligned components to maintain warranty and performance expectations. Practical considerations - Before ordering, verify fit and ratings against your existing panel catalog or drawings to ensure seamless integration. - Keep the exact part number handy for future service needs and inventory management, since substitutions can affect trip curves and enclosure fit. - Use this breaker in applications where up to 600V systems are in operation and 400A protection is required for robust circuit defenses. If you’re replacing or retrofitting a three-phase system that demands dependable protection with exact specifications, the Schneider Electric LJL36400CU33X circuit breaker is a precise, durable choice that supports safe, continuous operation while aligning with Schneider Electric’s trusted engineering.