Square D AU500 Circuit Breaker, 500A, 3-Pole, 600V

The Square D AU500 Circuit Breaker is engineered for demanding industrial electrical service, maintenance, and replacement projects. With a 500 A rating, a 3-pole configuration, and a 600 V capacity, it delivers reliable protection for three‑phase power systems where downtime isn’t an option.

• High-current, three-phase protection: 500 A amperage and a 3-pole design guard your distribution panels and feeders against overcurrent across all three phases.
• 600 V capability: Ready for a wide range of industrial loads and distribution networks, from manufacturing lines to large equipment motors.
• Trusted Square D reliability: Built by a heritage brand known for rugged performance in harsh industrial environments, helping your systems stay protected in challenging conditions.
• Efficient compatibility verification: Use the part number AU500 to confirm fit with your panel, switchgear, or replacement plan, ensuring a seamless swap when service life ends or faults occur.
• Simple, practical replacement option: Designed for straightforward replacement in existing installations that specify AU500, minimizing downtime during maintenance or upgrades.

Compatibility and selection guidance

• Part number first: Verify that AU500 matches the exact breaker specified for your equipment and application requirements.
• Electrical specs at a glance: Ensure the system uses 3-phase power and that the working voltage does not exceed 600 V.
• Application fit: Confirm the breaker’s amperage rating aligns with your load profile and that your panel or switchgear supports a 3-pole unit of this type.

Ideal use cases

• New installations in industrial facilities requiring robust three-phase protection.
• Maintenance outages and planned replacements for aging or failed breakers in manufacturing plants.
• Motor control centers and large distribution panels where reliable 500 A protection is essential.
• Upgrade projects where compatibility with Square D AU500 is specified by the equipment manufacturer.

Why this matters for your operation

• Stability under peak loads: Protect equipment and personnel by quickly interrupting fault currents in 3-phase systems.
• Downtime reduction: A dependable replacement option that aligns with existing AU500 specifications helps keep service windows tight.
• Clear compatibility path: The AU500 part number provides a straightforward way to confirm fit before purchase, reducing guesswork and rework.

Practical tips for a smooth purchase and installation

• Have your equipment specifications on hand (part number, amperage, poles, and voltage) to ensure an exact match with AU500.
• Use the AU500 as a reference point when planning replacements in legacy panels or gear that require Square D protection.
• Consult a qualified electrical professional during selection to validate panel compatibility and installation requirements.
• Keep a spare AU500 in inventory for rapid replacement and minimized downtime during maintenance cycles.

If you need help matching a part number or confirming compatibility, send us a message and we’ll assist you in verifying the AU500 fits your application.