Square D LHL36000M8041 400A 3-Pole 600 V Circuit Breaker

Meet the Square D LHL36000M8041 — a robust 400 A, 3-pole, 600 V circuit breaker designed to safeguard three-phase power distribution in demanding environments. Built to slot into Square D panels, this unit delivers consistent, reliable protection for your critical electrical systems.

Specifications at a glance

• Current rating: 400 A
• Poles: 3
• Voltage rating: 600 V

Why this 3-pole configuration matters

In a three-phase system, a 3-pole breaker trips all phases together, ensuring coordinated shutdown of connected equipment and preventing dangerous phase imbalances. The LHL36000M8041 is purpose-built for such applications, providing comprehensive protection for motors, feeders, and other high-demand loads across all three phases.

Ideal applications

• Main service protection in industrial facilities and larger commercial sites with three-phase power
• Feeder protection for motor control centers and large motor loads
• Replacement breaker in 600 V distribution panels where a reliable, high-current interrupt is required

What sets it apart

• Square D compatibility: Specifically chosen part number for seamless integration with existing Square D equipment and replacement parts.
• Focused three-phase protection: The 3-pole design ensures synchronized response across all phases, reducing the risk of unequal loading and cascading faults.
• Clear suitability for high-demand systems: With a 400 A rating, this breaker is well-suited for substantial distribution networks where robust protection is essential.

Practical usage tips

To get the most from the LHL36000M8041, align it with compatible Square D panels and follow the panel manufacturer’s installation guidelines. Verify that the facility’s electrical design accommodates a 600 V system and that all terminations are torqued according to the relevant standards. Label the breaker clearly in your load center so maintenance teams can identify and test the protection path quickly.