Square D | QGA321506 | Circuit Breaker | 150A | 3-Pole | 240V

When you need reliable protection for a 240V system, the Square D QGA321506 circuit breaker delivers purpose with precise compatibility. This 150A, 3-pole device is crafted for maintenance, retrofit, and replacement projects where exact specs matter, ensuring you stay within your panel’s original design intentions.

Key specifications

• Amperage: 150A
• Poles: 3-Pole
• Voltage: 240V
• Part number: QGA321506

Why this Square D breaker is the right choice

• OEM-aligned compatibility: Designed to align with Square D panels and distribution equipment, helping maintain proper fit, mounting, and electrical ratings.
• Ideal for maintenance, retrofit, and replacement: A dependable solution when you’re updating aging panels or restoring circuit protection after a fault.
• Best reference for compatibility: The part number QGA321506 is your most reliable guide to ensuring the breaker will match your system’s requirements.

How to verify fit and install

Notes: Confirm fit and ratings before ordering. The part number is the best reference for compatibility. Use these quick checks to validate suitability:

• Match amperage (150A), number of poles (3), and voltage (240V) to your panel’s specifications.
• Cross-check the panel model or catalog to confirm it accepts QGA-series breakers.
• For safety and optimal performance, have a qualified electrical professional handle installation and ensure the main power is off during replacement.

Who should consider this breaker

Ideal for electricians, facilities managers, and homeowners maintaining Square D electrical systems who need a reliable 150A, 3-pole, 240V circuit protection solution. Use it for controlled upgrades in service panels, maintenance of existing circuits, or precise replacements where OEM compatibility is critical.

Practical usage and guidance

• Keep a compatible spare on hand for planned maintenance to minimize downtime.
• Document the part number (QGA321506) in your panel records to simplify future servicing and replacements.
• When replacing, verify labeling on the panel cover matches the panel’s listed breaker types to avoid compatibility gaps.