Square D | LHL36000M1287 | Circuit Breaker | 400A | 3-Pole | 600V

The Square D LHL36000M1287 circuit breaker is a purpose-built protection device for demanding electrical panels. With a 400A rating, 3 poles, and a 600V operating capability, this unit is designed to reliably interrupt fault currents in three-phase distribution networks while fitting neatly into standard Square D enclosures.

Ideal for maintenance, retrofit, and replacement projects where exact specifications matter, this breaker preserves system safety without requiring a full panel upgrade. The LHL36000M1287 part number is the best reference for compatibility, making it easier to source the right device the first time.

Key specifications

• Amperage: 400A
• Poles: 3-Pole
• Voltage: 600V
• Part number: LHL36000M1287

What makes it stand out

Quality protection from Square D means consistent performance, long service life, and predictable trips when you need them. This circuit breaker is engineered to stay reliable under routine cycling and fault conditions, helping minimize downtime and protect valuable equipment in commercial and industrial environments.

Use cases and ideal applications

• Replacement for aging 3-pole, 600V breakers in existing Square D panels
• Retrofit projects where matching the exact amperage, pole count, and voltage is critical
• Maintenance scenarios that demand a drop-in device with proven compatibility

Installation and compatibility tips

Before ordering, confirm fit and ratings—the part number LHL36000M1287 is the most reliable reference for compatibility with your panel. If you’re upgrading or replacing, ensure the panel labeling supports a 400A, 3-Pole, 600V device and that mounting and terminal configurations align with the unit you select.

With the Square D LHL36000M1287, you’re choosing a trusted component that supports reliable protection and smooth maintenance workflows, keeping critical loads protected while minimizing replacement headaches.