Square D | MA364501121 | Circuit Breaker | 450A | 3-Pole | 600V

Introducing the Square D MA364501121 Circuit Breaker — a high-capacity protection solution engineered for demanding electrical installations. Boasting a 450A rating, a 3-pole configuration, and a 600V operating range, it delivers robust, reliable protection for large feeders and heavy-duty motor circuits in industrial environments.

This model is designed for maintenance, retrofit, and replacement projects where exact specifications matter. Use the MA364501121 as the primary reference to guarantee compatibility within your panel or switchgear lineup. Confirm fit and ratings before ordering to avoid mismatches.

Key benefits

• High-current capability: 450A rating supports heavy-duty feeders and large motors without unnecessary interruptions due to overload.
• Three-pole protection: Coordinated protection across all live conductors in 600V systems for enhanced safety and reliability.
• 600V suitability: Designed for industrial environments and higher-voltage mains that demand dependable protection.
• Compatibility-first approach: The part number MA364501121 is the most reliable reference for ensuring correct fit, ratings, and interchangeability within Square D ecosystems.
• Flexible deployment: Well-suited for new installations, retrofits, or replacements in panels designed for 450A, 3-pole, 600V breakers.

Use cases and installation scenarios

• Power distribution panels in manufacturing lines with large three-phase loads
• Motor control centers requiring a 450A, 600V protective device
• Retrofit projects where an existing 450A, 3-pole, 600V breaker is being replaced with an equivalent model
• Maintenance cycles that demand a reliable, spec-matched breaker to minimize downtime

Why choose this Square D breaker

Opting for a breaker that aligns precisely with your panel’s schedule reduces compatibility risk and simplifies ordering. The MA364501121’s 450A, 3-pole, 600V configuration is a common fit for legacy Square D installations that require consistent performance and a matching spec reference.

Practical tips for success

• Before purchasing, cross-check the panel schedule or labeling to confirm that a 450A, 3-pole, 600V device matches your requirements.
• Keep the MA364501121 part number handy as the most reliable reference when coordinating with distributors or service personnel.
• Store spares in labeled bins by amperage, pole count, and voltage rating to simplify future replacements and maintenance planning.