Square D LE36300LSG 300A 3-Pole 600 V Circuit Breaker

The Square D LE36300LSG 300A 3-Pole 600V Circuit Breaker is built for serious, high-demand electrical systems that demand dependable overcurrent protection. With a 300 amp rating and a three-pole design, this breaker is purpose-built for 3-phase power distribution in commercial and industrial environments, delivering consistent protection across all phases in up to 600 V installations.

Key specifications at a glance

• Part Number: LE36300LSG
• Current Rating: 300 A
• Poles: 3
• Voltage Rating: 600 V

Ideal uses and scenarios

Designed for three-phase electrical systems, the LE36300LSG serves as a robust main protection device or as a feeder breaker within larger panelboards. It’s a natural fit for facilities that rely on reliable 3-phase power for motors, compressors, conveyors, and other heavy loads. When you need dependable shutoff and branch protection in a 3-pole configuration, this Square D breaker delivers matching performance across all phases, helping to prevent equipment damage and reduce downtime.

Why this Square D breaker stands out

In demanding environments, you want a protection solution that aligns with the rest of your distribution ecosystem. The LE36300LSG is part of Square D’s legacy lineup, known for consistency and compatibility within Square D and Schneider Electric installations. Its 3-pole design ensures balanced protection in 3-phase circuits, while its 600 V rating makes it suitable for a range of industrial and commercial panelboard applications. If you’re upgrading or stocking replacement parts for a multi-phase system, this model provides a reliable, standard-fit option that integrates cleanly with existing Square D components.

Key considerations for installation and compatibility

Before integrating the LE36300LSG, verify that your panel or switchboard supports a 3-pole, 600 V configuration and that your system’s load demands align with a 300 A protective device. As with all high-current equipment, installation should follow relevant electrical codes and manufacturer guidance. Handle with proper PPE, and ensure the equipment is de-energized and grounded during replacement or installation to maintain a safe workspace.

Practical tips and insights

• Use in three-phase environments to guarantee uniform protection across all live conductors, reducing the risk of unbalanced loading.
• Pair with compatible Square D panels and accessories to maintain a cohesive protection strategy and simplify future maintenance or replacements.
• Document the Part Number LE36300LSG in your asset tracking to streamline inventory management and service planning for large facilities.
• Consult local electrical codes and your facility’s safety protocols when sizing breakers for motors and heavy equipment to ensure appropriate protections and coordination.

Whether you’re upgrading an aging distribution panel, stocking a maintenance inventory, or specifying parts for a new installation, the Square D LE36300LSG 300A 3-Pole 600V Circuit Breaker offers clear, reliable three-phase protection that keeps complex electrical systems running smoothly. It’s a precise fit for professionals who demand consistency, compatibility, and solid performance in demanding power environments.