Square D | MA263501021 | Circuit Breaker | 350A | 3-Pole | 600V

Meet the Square D MA263501021 circuit breaker — a robust, three-pole protection device designed for demanding 3-phase systems. Built to handle serious load requirements, this 350A, 600V breaker is ideal for maintenance, retrofit, and replacement projects where exact specifications matter.

Key specifications at a glance

• Amperage: 350A
• Poles: 3-Pole (3-phase protection)
• Voltage: 600V
• Purpose: Suitable for maintenance, retrofit, and replacement where matching specs are required

Why this specific MA263501021 model stands out

• The part number MA263501021 is the best reference for ensuring proper fit within your panel or distribution system. It’s designed to integrate with existing Square D layouts and 3-pole 600V applications.
• With a three-pole configuration, it guards all legs of your 3‑phase circuits, helping to prevent uneven loading and electrical faults that could impact equipment uptime.
• When upgrading old panels or replacing failed units, this breaker provides a straightforward path to reestablishing solid overcurrent protection without overhauling your electrical architecture.

Ideal applications and use cases

• Industrial facilities with 3‑phase equipment or motors powered by up to 600V systems
• Panel upgrades and retrofits where exact MA263501021 specifications are required
• Maintenance replacements to minimize downtime and maintain continuity of operations

Practical guidance for purchasing and installation

• Verify fit and ratings before ordering. The MA263501021 part number is the most reliable reference for compatibility with your panel model and electrical architecture.
• Plan for panel compatibility—confirm that your enclosure, bus arrangement, and mounting provisions align with a 3‑pole 600V protective device of this amperage.
• Safety and maintenance—utilize proper lockout/tagout procedures and follow OEM guidelines during replacement to ensure safe, code-compliant operation.

Choosing the right circuit breaker matters for reliability and long-term cost of ownership. The Square D MA263501021 350A 3‑Pole 600V device delivers precise protection for demanding 3‑phase networks, supports retrofit initiatives, and helps reef in your electrical system with a dependable, compatible replacement option. When in doubt, reference the exact part number to confirm fit, and you’ll reduce guesswork while safeguarding critical equipment.