Square D LAL3640035M1021 400A 3-Pole 600 V Circuit Breaker

Square D LAL3640035M1021 400A 3-Pole 600 V Circuit Breaker is built for demanding electrical environments where reliability and safety matter. This three-pole protector delivers solid overcurrent protection for three-phase circuits, helping to safeguard wiring, equipment, and downtime-critical systems in commercial and industrial settings.

Designed to work within compatible Square D distribution panels, this breaker is a dependable choice when you need robust main or feeder protection for three-phase service up to 600 V. Its 400 A rating makes it suitable for sizable feeders and panel mains, providing a clear, scalable path for expanding power needs without compromising safety.

Key specifications at a glance

• Current rating: 400 A
• Poles: 3
• Voltage rating: 600 V
• Part number: LAL3640035M1021
• Brand: Square D

Why this 3-Pole 600 V breaker stands out

• Three-phase protection: Perfect for commercial and industrial electrical distributions that rely on three-phase power, ensuring coordinated protection across all live lines.
• High-capacity safeguard: A 400 A rating provides a strong line of defense for large feeders and panel mains, reducing the risk of nuisance trips on heavy loads.
• Reliable Square D quality: Built by a trusted name in electrical distribution, designed for long-term performance in demanding environments.
• Clear identification and compatibility: Part number LAL3640035M1021 helps ensure you’re selecting the exact replacement or installation part for compatible Square D panels and systems.

This breaker is ideal for facilities managers, electrical contractors, and maintenance technicians who need dependable protection for three-phase circuits up to 600 V. It’s a practical choice for main protection in larger panels or as a robust feeder breaker in industrial switchgear and service entrance applications. When installing, follow all manufacturer guidelines and local electrical codes to ensure safe, code-compliant operation.