Square D | MA26300 | Circuit Breaker | 300A | 2-Pole | 600V

When you need robust overcurrent protection for high-demand circuits, the Square D MA26300 circuit breaker delivers. Crafted by Square D and identified by part number MA26300, this 300-amp, two-pole, 600-volt breaker is built for maintenance, retrofit, and replacement projects where exact specifications matter.

Key specifications

• Amperage: 300 A
• Poles: 2-Pole
• Voltage rating: 600 V

Why choose the MA26300 for your panel?

• Genuine Square D component designed to fit compatible panels and breakers with matching specs, minimizing compatibility surprises during installation.
• Ideal for retrofitting older service equipment or replacing a failed unit in high-current circuits that require reliable 2-pole protection at 600V.
• The part number MA26300 is the most reliable reference when confirming fit with your panel catalog; always cross-check against your panel labeling and the manufacturer's compatibility list.

How this breaker solves common needs

• Reduces downtime by using a factory-approved replacement that matches the original breaker’s amperage, pole count, and voltage.
• Supports safer shutdowns and overcurrent protection for critical loads in commercial and light industrial environments.
• Simple replacement path for service panels that require a 300A, 2-pole, 600V protective device without redesigning wiring or bus connections.

Practical installation and usage tips

• Before ordering, confirm fit with your panel by verifying the panel model, bus configuration, and the MA26300’s 2-pole, 300A, 600V rating matches the original device.
• Follow the panel manufacturer’s instructions for mounting, electrical connections, and torque specs to ensure a secure, code-compliant installation.
• Store spare breakers in a clean, dry environment to prevent corrosion or deformation of mounting points.