Square D | QDA321106 | Circuit Breaker | 3-Pole | 240V

Meet the Square D QDA321106 circuit breaker: a dependable 3-pole, 240V protection device crafted for commercial and industrial electrical panels. Engineered for maintenance, retrofit, and replacement tasks, this breaker makes it straightforward to restore safety and reliability without guesswork on compatibility.

Key features at a glance:

• Exact part reference: The QDA321106 part number is the best reference for compatibility with Square D panels and the QDA family.
• Three-pole protection: Supports three-phase circuits, helping evenly distribute load and protect every leg in your 240V system.
• 240V rated: Designed for standard commercial/industrial 240-volt distribution networks.
• Ready for retrofit and replacement: Ideal when upgrading or refreshing old breakers in a panel that requires precise specifications.

Typical use scenarios include equipment rooms in manufacturing facilities, data centers, commercial buildings, and service panels where exact QDA-series compatibility is essential. If you're performing a panel retrofit or routine maintenance, this breaker provides a straightforward, reliable path to restore circuit protection.

Why this matters: Using the exact part number for your replacement minimizes the risk of mismatched ratings or fit, reduces downtime, and keeps your electrical system aligned with your panel's design and labeling. Square D’s QDA line is known for robust construction and trusted performance in demanding environments.

Important: Confirm fit and ratings before ordering. The part number is the best reference for compatibility.