Square D LJA36400U31X - 400A, Circuit Breaker

The Square D LJA36400U31X 400A Circuit Breaker delivers reliable overcurrent protection for demanding electrical systems. Engineered for industrial and commercial environments, this unit is designed to safeguard critical loads with clear, decisive interruption when faults occur.

Specifically suited for panelboards, switchboards, control panels, and OEM equipment, it provides robust protection in distribution panels and motor control centers where uptime and safety are non-negotiable.

Key specifications

• Current rating: 400A
• Breaker type: Circuit Breaker
• Compatible applications: panelboards, switchboards, control panels, OEM equipment

Why this breaker stands out

• Trusted performance in high-load environments where space and reliability matter
• Straightforward integration with common electrical architectures used in industrial and commercial settings
• Designed to protect distribution panels and motor control centers from damaging overcurrents and short circuits

Best-fit use cases

• Industrial manufacturing lines that require consistent, high-current protection
• OEM equipment built around a 400A protection boundary
• Commercial facilities with demanding power distribution and safety requirements

Practical considerations

Before deploying, verify your system’s current rating and ensure compatibility with your panelboard or switchboard family. This 400A device is a decisive choice for safeguarding heavy electrical loads while helping maintain safe operating conditions across the power distribution network.