Schneider Electric LJL36400U43X Circuit Breaker, 400A, 3-Pole

The Schneider Electric LJL36400U43X Circuit Breaker is a rugged, industrial-grade overcurrent protection device designed to keep demanding electrical systems safe and reliable. With a 400 A rating spread across 3 poles, this breaker is tailored for three-phase power distribution found in manufacturing floors, maintenance bays, and heavy machinery installations.

Why choose the LJL36400U43X for your project?

• High current capacity—capable of interrupting fault currents in demanding industrial applications without compromising system protection.
• Three-pole design—perfect for standard three-phase electrical distributions, helping to ensure coordinated protection across all phases.
• Part number-based compatibility—use LJL36400U43X to confirm fit for your application and system requirements.
• Industrial-ready reliability—built for service, maintenance, and replacement projects where downtime must be minimized and protection must be consistent.
• Support when you need it—if you’re unsure about compatibility or fit, you can message us and we’ll help verify the right part for your setup.

Key specifications at a glance

• Manufacturer: Schneider Electric
• Product Type: Circuit Breaker
• Amperage: 400 A
• Poles: 3
• Part Number: LJL36400U43X

Ideal use cases

This breaker is well-suited for:

• New industrial installations requiring robust three-phase protection
• Panel upgrades and serviceability in factories, processing plants, and large commercial facilities
• Maintenance projects where reliable interruption-of-current is critical to prevent equipment damage
• Replacement of aging protection devices with a contemporary Schneider Electric solution

Note: Verify fit by part number and application requirements to ensure seamless integration with your existing gear. If you need a quick compatibility check or guidance on pairing this breaker with your panels, reach out—we’re ready to assist with precise, practical advice.