Square D | LHP36400-BLACK | Circuit Breaker | 400A | 3-Pole | 600V

Meet the Square D LHP36400-BLACK Circuit Breaker — a rugged 400A, 3-pole, 600V protection device designed for demanding electrical environments. Built to support maintenance, retrofit, and replacement projects, this breaker helps you preserve reliable power distribution when upgrading panels or replacing aging hardware.

Key specifications at a glance: 400A, 3-pole, 600V. These ratings make it suitable for demanding 3-phase circuits in industrial or commercial settings where stable protection is critical.

• Best-fit reference: Use the part number LHP36400-BLACK as the primary reference for compatibility with Square D panels and assemblies.
• 3-Pole protection: Provides coordinated protection across all three phases, essential for balanced 3-phase networks.
• Maintenance, retrofit, replacement: Ideal when you’re restoring service, upgrading to a higher-capacity breaker, or replacing a failed device in an existing installation.
• Durable design: Engineered for reliable interrupted service and consistent performance in daily operation.

Before you purchase, verify fit and ratings against your panel model and system requirements. The exact part number is the most reliable indicator of compatibility, reducing the risk of mismatches and ensuring safe, effective protection.

Who benefits most from this Square D breaker? Technicians, facilities engineers, and maintenance teams working with 3-phase, 600V distribution networks that demand a trusted 400A main or feeder protection device. If you’re upgrading an older installation or replacing a failed breaker, the LHP36400-BLACK offers a straightforward, dependable path to restore service without compromising system integrity.