Square D | MA263501121 | Circuit Breaker | 350A | 3-Pole | 600V

The Square D MA263501121 circuit breaker is a robust protective device engineered for demanding electrical environments. With a 350A rating, 3-pole configuration, and 600V capacity, this breaker delivers dependable, three-phase protection essential for industrial distributions and large electrical panels.

Designed for maintenance, retrofit, and replacement projects where exact specifications matter, this unit aligns with existing Square D installations. Using the exact part number MA263501121 helps ensure compatibility and minimizes downtime during upgrades or service work.

• Amperage: 350A
• Poles: 3-Pole
• Voltage: 600V
• Reference for compatibility: Part number MA263501121

Ideal for facilities undergoing panel modernization, service replacements, or new installations that require a high-current, three-phase interrupting device. This breaker is well-suited for data centers, manufacturing floors, and other industrial environments where reliable protection and precise current handling are essential.

• Use MA263501121 as the primary compatibility reference when sourcing parts for existing Square D panels.
• Confirm fit and ratings before ordering to match your panel’s catalog, labeling, and three-phase load requirements.
• Plan replacements during planned maintenance windows to minimize operational disruption and ensure correct trip characteristics.

Installation and safety note: Power should be fully isolated before any replacement work. Installers should follow all applicable electrical codes and use appropriate PPE. If you’re unsure about compatibility or installation, consult a licensed electrician to verify panel compatibility and proper electrical protection alignment.