Square D | MA36300 | Circuit Breaker | 3-Pole

Square D MA36300 is a purpose-built 3-pole circuit breaker designed for maintenance, retrofit, and replacement tasks where exact specifications matter. With a three-pole configuration, it provides robust protection for three-phase electrical distribution, making it a reliable choice for panel upgrades, service refreshes, or replacement projects in professional installations.

Why this MA36300 3-Pole breaker stands out

• 3-Pole configuration supports three-phase systems, enabling coordinated protection across all conductors in typical industrial and commercial power layouts.
• Designed for maintenance, retrofit, and replacement scenarios where precise matching specs are essential to maintain electrical safety and performance.
• The MA36300 part number serves as the most reliable compatibility reference—use it to verify fit with your existing Square D panel and related protective devices.
• Clear guidance that helps you avoid mismatches by confirming fit and ratings before ordering, reducing downtime and returns.

Ideal use cases

• Replacing a worn or failed 3-pole breaker in a three-phase panel to restore normal operation quickly and safely.
• Performing retrofits or panel upgrades where the exact MA36300 specification is required to maintain system protection standards.
• Building a service stock for maintenance teams that standardizes on a specific part number to simplify ordering and cross-reference checks.

How to verify compatibility

• Check your panel labeling and documentation to see if the MA36300 part number is listed as an approved component for your system.
• Match the part number MA36300 to your existing protection scheme to ensure the same trip characteristics and mounting arrangement are maintained.
• Before ordering, confirm the intended voltage, current rating, and interrupting capacity align with your service requirements and panel specifications.

Installation and best-practice reminders

• Power down the equipment, follow lockout/tagout procedures, and use appropriate personal protective equipment.
• Follow all relevant electrical codes and manufacturer guidelines when replacing or installing the breaker.
• Handle the device carefully to prevent damage to terminals and contacts during installation.

Specification snapshot

• Poles: 3-Pole
• Part number: MA36300
• Brand: Square D
• Type: Circuit Breaker
• Recommended use: maintenance, retrofit, and replacement where exact specs are required