Square D MXL368001212 800A 3-Pole 600 V Circuit Breaker

Meet the Square D MXL368001212 800A 3-Pole 600 V Circuit Breaker — a purpose-built protection device for demanding commercial and industrial electrical systems. When uptime and safety matter, this 800-amp main breaker delivers decisive, reliable overcurrent protection for three-phase power distribution up to 600 volts.

Why this 3-Pole design matters. With three independent conductors switching together, the MXL368001212 prevents dangerous open-phase conditions and helps maintain balanced loads across motors, pumps, and other three-phase equipment. In environments where large equipment starts or heavy cycling occurs, this configuration supports safer startups and more stable protection coordination.

Key benefits

• High-current capability — 800 A rating handles substantial load demands common in medium-to-large facilities.
• Three-pole protection — simultaneous tripping of all phases enhances safety and reduces fault propagation in multi-phase systems.
• 600 V maximum rating — suitable for a wide range of industrial power distributions and commercial installations.
• Trusted Square D reliability — part of a long-standing lineup designed for robustness in challenging environments.
• Exact part compatibility — Part Number MXL368001212 ensures proper fit within compatible Square D panels and enclosures designed for 800A devices.

This breaker is ideal for upgrading or replacing main protection in large electrical panels, data centers, manufacturing floors, HVAC plants, and other facilities where a single, dependable main disconnect is essential. It helps safeguard wiring, cabling, and motors from overloads while supporting clear fault indication and prompt isolation of the affected circuit.

Practical considerations. Verify that your panel enclosure and bus configuration are compatible with a 3-pole, 800 A device and that the overall system voltage aligns with the 600 V rating. Follow local electrical codes and manufacturer installation guidelines for torque, wiring, and clearance to ensure a safe, compliant setup. For projects aiming to simplify protection strategy in high-load environments, this Square D breaker provides a decisive, high-capacity solution with a straightforward, reliable form factor.

Specifications at a glance

• Current rating: 800 A
• Poles: 3
• Voltage rating: 600 V
• Part number: MXL368001212