Square D LAP36400MB - 400A, 600VAC, 3-Pole, Circuit Breaker

Meet the Square D LAP36400MB — a robust 400A, 600VAC, 3-pole circuit breaker designed for demanding electrical environments. Built to deliver dependable overcurrent protection, it’s a trusted choice for panelboards, switchboards, and control panels where safety and reliability matter most.

Engineered for industrial, commercial, and OEM applications, the LAP36400MB provides clear, balanced protection across all three phases, helping to safeguard motors, feeders, and critical distribution infrastructure from fault conditions while supporting safe, uninterrupted operation of your power system.

Why the LAP36400MB stands out

• High-current performance: 400 A rating handles heavy load centers and significant distribution needs without compromising protection.
• Three-phase versatility: 3-pole configuration ensures coordinated protection across all phases in three-phase networks.
• Broad voltage compatibility: Rated up to 600 VAC, making it suitable for common industrial and commercial power systems.
• Flexible installation: Ideal for integration into panelboards, switchboards, and motor control centers, supporting a range of enclosure designs and layouts.

Ideal use cases

The Square D LAP36400MB shines in environments that demand durable, reliable protection for large-scale electrical distribution. Imagine it safeguarding a factory’s main distribution panel, protecting heavy-duty motors in a processing line, or serving as a dependable OEM component in custom control panels. It’s equally at home in new builds and as a high-capacity replacement in established Square D installations.

Specifications at a glance

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

What this means for your operation

Choosing the LAP36400MB means prioritizing safety and continuity. With dependable overcurrent protection, you reduce the risk of damage from electrical faults, minimize unplanned downtime, and maintain smoother operation of motors and feeders. The 3-pole design supports balanced protection across all phases, which is crucial for maintaining synchronized performance in three-phase systems.

Quality you can rely on

As part of the Square D family, this circuit breaker carries the legacy of durable construction and proven reliability. It’s designed to integrate with compatible enclosures and labeling, helping you maintain compliance and straightforward maintenance in your electrical distribution system.

Practical tips for deployment

• Match the LAP36400MB to your existing three-phase infrastructure when upgrading or expanding distribution panels and motor control centers.
• Use in OEM assemblies that require a high-capacity, 3-pole protective device with a 600 VAC rating for modern industrial networks.
• Plan for easy replacement by selecting compatible accessories and mounting configurations within your Square D ecosystem.