Square D LHP36400MT Circuit Breaker, 400A, 3-Pole, 600V

Engineered for demanding industrial environments, the Square D LHP36400MT is a 3-pole, 400 A circuit breaker rated for 600 V. As part of the LH series, it delivers reliable protection for large three-phase electrical systems used in service, maintenance, and replacement projects. Confirm compatibility by the part number to ensure a perfect fit for your panel or switchgear.

• Configuration: 3-pole (three-phase) circuit breaker designed for distributing power in industrial settings.
• Current rating: 400 A nominal to protect feeders and main circuits in high-demand applications.
• Voltage rating: 600 V maximum, suitable for standard industrial power distribution environments.
• Series and compatibility: LH series; use part number LHP36400MT to verify fit with your equipment and application requirements.
• Ideal uses: main service panels, distribution boards, motor control centers, and retrofit/replacement projects in manufacturing, facilities, and processing environments.
• Support and verification: If you’re unsure about compatibility, send us a message and we’ll help confirm fit for your specific setup.

Practical considerations and use cases

When upgrading or maintaining industrial electrical systems, a 3-pole, 400 A breaker like the LHP36400MT provides centralized protection for three-phase loads. Use it in panels where high-current protection is required, and ensure the surrounding hardware, busbars, and enclosure are rated for 600 V and 400 A. This model is especially well-suited for retrofit projects where LH-series breakers are already in use, helping to reduce panel rework and alignment issues.

Why choose Square D LH series for your project?

Square D LH breakers are a widely adopted standard in industrial power distribution. The LHP36400MT’s 3-pole, 400 A rating aligns with common utility and equipment protections, while its LH-series design ensures reliable mounting, trip performance, and straightforward replacement when you’re maintaining an aging system or expanding capacity.