Square D | MA264501121 | Circuit Breaker | 450A | 3-Pole | 600V

The Square D MA264501121 circuit breaker is a rugged, three-pole overcurrent protection device engineered for demanding 600V three-phase electrical systems. Designed for maintenance, retrofit, and replacement applications, this 450A breaker delivers reliable interruption performance in industrial and commercial installations that rely on Square D standards for compatibility and safety.

• Amperage rating: 450 A
• Poles: 3-Pole
• Voltage rating: 600 V
• Configuration: Three-phase protection for balanced distribution and feeders

Why choose the MA264501121 for your system? It’s a purpose-built replacement that matches Square D specifications, ensuring proper fit, mounting, and electrical characteristics in compatible panels and feeders. This makes it an ideal choice for upgrading or restoring circuit protection in facilities with demanding load profiles and strict safety standards.

Key use cases and benefits

• Maintenance: Replace aging or worn breakers in 600V, three-phase service without altering panel hardware or wiring.
• Retrofit: Update legacy installations to modern, code-compliant protection using a trusted Square D component.
• Replacement: Use as an exact reference part when panel catalogs or technician notes specify MA264501121.
• Panel compatibility: Designed to align with Square D enclosures and distribution boards that require a 3-pole, 450A 600V breaker.

Compatibility note: Confirm fit and ratings before ordering. The part number MA264501121 is the best reference to ensure you’re selecting the correct replacement for your specific panel or distribution setup.

Practical guidelines for installation and handling: verify the panel’s current rating and the breaker’s trip characteristics before integrating into live systems, follow proper locking and tagging procedures, and consult your facility’s electrical documentation to confirm that this 3-pole, 600V device meets your protection and coordination requirements.