Square D QOU245 - 45A, 2-Pole, Circuit Breaker

Meet the Square D QOU245 — a rugged 45A, 2-pole circuit breaker engineered for dependable overcurrent protection in demanding electrical environments. Built to integrate seamlessly into panelboards, switchboards, and control panels, this unit is a reliable building block for safe, continuous operation in industrial, commercial, and OEM applications.

• Current rating: 45A
• Poles: 2-Pole
• Breaker type: Circuit Breaker
• Configuration benefits: 2-pole design enables simultaneous disconnection of both hot legs, enhancing safety for 240V circuits and motor-driven loads.

Why this 2-pole design matters

With a two-pole configuration, the QOU245 provides coordinated protection across both lines. This means when an overcurrent event occurs, both poles trip together, reducing the risk of shock, minimizing arc exposure, and ensuring a clean, safe shutdown of multi-phase equipment. It’s especially beneficial for motor control centers and any installation where protection on all live conductors is essential.

Ideal applications and use cases

• Distribution panels and switchboards in industrial facilities where heavy loads and motors are common
• Motor control centers needing reliable branch circuit protection
• Commercial electrical feeders requiring robust, space-efficient overcurrent protection
• OEM equipment enclosures that demand quick, dependable protection that fits standard Square D panel ecosystems

What sets the QOU245 apart

• Trusted brand heritage: Part of Square D’s proven protection lineup, designed for compatibility with a wide range of Square D panels and accessories.
• Clear protection for critical loads: 45A rating is well-suited for mid-range feeders and motor circuits, balancing protection with the ability to sustain legitimate startup and running currents.
• Durable construction for harsh environments: Built to withstand industrial conditions, helping reduce nuisance tripping and maintenance downtime.

Installation and practical tips

Plan for compatibility with your panelboard or switchboard before replacement or new installation. Confirm that the QOU245 fits your enclosure’s space and bus configuration, and follow the manufacturer’s torque and alignment recommendations to ensure reliable engagement. Consider the ambient temperature and cooling in your service location, as these factors can influence trip characteristics and long-term performance.

Whether you’re upgrading a distribution panel, configuring a motor control center, or stocking OEM equipment with dependable protection, the Square D QOU245 delivers precise, durable overcurrent protection with a design that aligns with established Square D ecosystems.