Square D QO350/50A/3P/240 - 350-50A, 240VAC, 3-Pole, Circuit Breaker

Meet the Square D QO350/50A/3P/240 — a rugged three-pole circuit breaker engineered to shield electrical distribution systems from overcurrent in demanding environments. With a 50 A current rating at up to 240 VAC, this unit delivers dependable protection for feeders, motors, and control circuits across industrial, commercial, and OEM applications.

Designed for seamless integration in panelboards, switchboards, and control panels, this breaker sits securely in the trusted Square D QO family, offering a familiar footprint and straightforward field replacement. It’s built to stand up to the rigors of everyday operation in demanding facilities while keeping installation efficient and reliable.

Why this model stands out

• 3-Pole configuration provides unified protection across three phases, simplifying panel design and wiring.
• 250 VAC-class performance tailored to standard power distribution, ensuring safe operation of feeders and motor circuits.
• Specifically rated for 50 A circuits, making it a precise fit for equipment and applications that require robust yet controllable protection.
• Part of the proven Square D QO series, supporting dependable, long-term operation in harsh or busy environments.
• Ideal for industrial facilities, commercial installations, and OEM setups where reliable overcurrent protection in distribution panels and motor control centers is essential.

Specifications at a glance

• Current rating: 50 A
• Voltage rating: 240 VAC
• Poles: 3-Pole
• Breaker type: Circuit Breaker
• Model: QO350/50A/3P/240

Practical use cases include protecting feeders to motors in manufacturing lines, safeguarding critical control circuits in distribution panels, and serving as a reliable replacement in panel upgrades. When selecting this breaker, ensure your panel accepts a 3-pole, 50 A, 240 V Square D device to maintain safe, compliant operation. For maintenance, keep the terminals clean, verify proper seating, and replace after sustained trips to preserve system integrity.