Square D | MGL36800SA | Circuit Breaker | 800A | 3-Pole | 600V

Square D MGL36800SA circuit breaker is a purpose-built, industrial-grade protection device designed to keep large electrical systems running safely. With an 800A rating in a 3-Pole configuration for 600V service, this unit is built for demanding environments where precise specs and reliable performance matter.

Designed for maintenance, retrofit, and replacement projects, the MGL36800SA helps you preserve system uptime by matching the original protection characteristics exactly. This means you’ll preserve trip curves, coordination, and protection philosophy that your panel was engineered to deliver, reducing the risk of mismatched components and unexpected outages.

• Amperage: 800A
• Poles: 3-Pole
• Voltage: 600V
• Part number: MGL36800SA

This unit is ideal for industrial control panels, feeders, and service equipment where a high-current, three-phase protection device is required. It’s particularly well-suited for legacy installations that rely on the Square D MGL series and where exact compatibility with the original equipment is crucial for safe, code-compliant operation.

Why choose this model? It’s the OEM reference for compatibility in applications demanding the same electrical characteristics as the original installation. Using the exact part number (MGL36800SA) ensures you’re aligning with the panel’s verified protection scheme, minimizing compatibility risks during retrofits or replacements.

Fit and compatibility tips — Before ordering, confirm fit and ratings by cross-checking the part number against your panel label and documentation. Ensure the panel or equipment is designed for 800A, 3-Pole, 600V protection in the MGL family to maintain proper electrical coordination and safety margins.

Practical use scenarios —

• Replacing a failed or obsolete breaker in large commercial/industrial panels that operate at 600V.
• Retrofit projects where you’re upgrading to a current, OEM-referenced component to maintain original protection specifications.
• Spare-part inventory for facilities with high-current 3-phase feeders to minimize downtime during maintenance windows.

With the Square D MGL36800SA in place, you gain confidence that your protection strategy remains intact, enabling safe operation, predictable maintenance cycles, and long-term reliability for systems that demand robust, uninterrupted power distribution.