Square D | MXF36300G | Circuit Breaker | 300A | 3-Pole | 600V

Square D MXF36300G is a high-capacity circuit breaker crafted for demanding electrical systems. At 300A with a three-pole configuration and a 600V rating, this unit delivers reliable protection for three-phase feeders in commercial and industrial environments. Built to withstand the rigors of heavy-duty distribution, it provides precise interrupting performance to keep your equipment safe and your operation running smoothly.

This MXF36300G model is ideal for maintenance, retrofit, and replacement projects where exact specifications matter. Use it in compatible Square D panels and switchgear to maintain consistent protection and system coordination with your existing protective devices.

• Amperage: 300 A
• Poles: 3-Pole (three-phase protection)
• Voltage: 600 V
• Type: Molded case circuit breaker, MXF family
• Applications: Maintenance, retrofit, and replacement in suitable electrical distribution systems
• Compatibility tip: The part number MXF36300G is the best reference for confirming fit and ratings—confirm compatibility before ordering

Why choose this MXF36300G over generic breakers? It’s engineered to integrate with Square D protection schemes, offering balanced trip characteristics across three phases and predictable performance in load centers, panels, and switchgear designed for 600V systems. This is particularly valuable in spaces where three-phase loads—such as motors, conveyors, or HVAC equipment—drive the demand for reliable protection that won’t compromise uptime.

Practical tips for installation and use:

• Match the breaker to the panel’s bus configuration and trip settings to ensure proper coordination.
• Verify the ratings against your system’s voltage, phase, and load requirements before replacement.
• Keep a spare MXF36300G on hand for planned maintenance or retrofit projects to minimize downtime.