Square D | MJM36500 | Circuit Breaker | 500A | 3-Pole | 600V

Square D MJM36500 Circuit Breaker is built for demanding electrical environments where reliable protection and precise control matter. With a 500A rating, a 3-pole configuration, and a 600V maximum operating voltage, this breaker is designed to safeguard heavy feeders and major motor circuits in commercial and industrial settings.

This unit is ideal for maintenance, retrofit, and replacement projects, offering a straightforward path to restoring safe, code-compliant service in Square D panel boards. Before ordering, verify fit and ratings on your panel label—the MJM36500 part number is the most dependable reference for compatibility with your Square D equipment.

Key benefits and what makes it unique

• High-current protection: 500A capacity protects feeders and large motors from overloads and electrical faults.
• Three-pole design: Delivers balanced, 3-phase protection essential for multi-motor and load-heavy applications.
• 600V rating: Suitable for mid- to high-voltage distribution in commercial, industrial, and service environments.
• Retrofit-ready: A practical choice when upgrading or replacing aging breakers in existing Square D installations, helping minimize downtime.
• Compatibility with Square D panels: Designed to align with Square D protection schemes and installation practices, reducing guesswork during replacement projects.

Ideal use cases

Use the MJM36500 to protect main feeders, large-capacity circuits, and motor-driven equipment in warehouses, manufacturing floors, data centers, and large office complexes. It’s especially valuable in systems where a single, reliable 3-pole protection solution at 500A is required within a 600V distribution network.

How to ensure a perfect match

1. Confirm that your panel accepts MJ-series breakers and that your system requires a 3-pole, 500A, 600V device.
2. Cross-check the panel labeling and the MJM36500 part number to guarantee compatibility and correct mounting type.
3. If replacing an older or non-matching unit, consult a licensed electrician to verify electrical clearances, bus connection, and service compatibility.

Note: Always confirm fit and ratings before ordering. The MJM36500 part number is the most reliable reference for ensuring compatibility with your Square D panels and protective equipment.