Square D LAL36400 - 400A, 600VAC, 3-Pole, Circuit Breaker

Power through demanding, three-phase applications with the Square D LAL36400—a rugged 400A, 600V circuit breaker built for critical protection in distribution panels, motor control centers, and OEM installations. Designed to deliver reliable overcurrent protection where it matters, this 3-Pole breaker keeps large feeders and motor circuits safe, reducing downtime and safeguarding your equipment.

Key specifications

• Current rating: 400A
• Voltage rating: 600VAC
• Poles: 3-Pole
• Breaker type: Circuit Breaker

Why the 3-Pole design matters

The three-pole configuration provides synchronized protection across all phases in three-phase power systems, ensuring balanced interruption during faults and preventing phase loss scenarios that can damage motors and electrical gear. This makes the LAL36400 ideal for panelboards, switchboards, and control panels where coordinated protection is essential.

Ideal applications

• Industrial facilities with high-current motor loads and complex distribution needs
• Commercial power distribution within panelboards and switchboards
• OEM equipment where standardized, robust overcurrent protection is required

What makes it valuable

Beyond its brick‑solid current and voltage ratings, the LAL36400 delivers dependable protection for critical circuits. By rapidly interrupting fault currents, it helps prevent wiring damage, reduces arc-flash risk, and supports safer operation across distribution panels and motor control centers. Its compatibility with standard three-phase electrical architectures simplifies integration into existing systems and field upgrades.

Practical insights and guidance

When integrating the LAL36400, ensure wiring and bus arrangements align with its 400A capacity and 3‑pole configuration. Use in installations where three-phase protection is required and where scalable, reliable performance is a priority for feeders and MCCs. This breaker is a solid choice for facilities prioritizing uptime, safety, and long-term reliability in power distribution.

Choose the Square D LAL36400 for consistent three‑phase protection, straightforward integration, and durable performance in demanding industrial, commercial, and OEM environments.