Square D QO345 - 45A, 3-Pole, Circuit Breaker

The Square D QO345 45A, 3-Pole Circuit Breaker is engineered to deliver dependable overcurrent protection for demanding electrical systems. Designed for seamless integration in panelboards, switchboards, and control panels, this unit keeps critical equipment safe while supporting efficient, three-phase operation in industrial, commercial, and OEM environments.

• Current rating: 45A
• Poles: 3-Pole (three-phase configuration)
• Breaker type: Circuit Breaker
• Series: Part of the Square D QO family, offering trusted protection in distribution panels and motor control centers

Ideal applications span the full spectrum of demanding electrical installations. In manufacturing facilities, the QO345 protects feeders and motors in distribution panels and motor control centers, helping prevent equipment damage and unplanned downtime. In commercial settings, it provides reliable protection for three-phase lighting, HVAC, and processing loads, delivering safe operation and ease of maintenance. For OEM equipment, the 3-pole design simplifies integration into compact, multi-phase systems where space and reliability are paramount.

What makes this model stand out is its focused combination of three-phase protection, robust current handling, and compatibility with the Square D QO platform. Instead of a one-size-fits-all breaker, the QO345 offers a precise solution for three-phase circuits, ensuring coordinated protection across distributed panels and motor control centers. This translates to easier panel upgrades, smoother maintenance, and consistent protection for your three-phase loads.

Practical considerations and benefits:

• Provides reliable overcurrent protection to minimize the risk of motor stalling and electrical faults in three-phase systems.
• Suitable for panelboards, switchboards, and control panels that require a 3-pole configuration.
• Streamlines maintenance and parts compatibility by aligning with the established Square D QO ecosystem.
• Ideal for environments where dependable performance and safe operation are critical, from industrial floors to commercial electrical rooms and OEM manufacturing setups.

Whether you’re expanding a panel, upgrading a control center, or configuring an OEM solution, the Square D QO345 45A 3-Pole Circuit Breaker provides targeted protection for three-phase circuits with clarity and confidence. Add it to your electrical protection plan to safeguard equipment, reduce downtime, and maintain reliable power distribution across your three-phase loads.