Square D QOU380 - 80A, 3-Pole, Circuit Breaker

The Square D QOU380 is a purpose-built 80A, 3-pole circuit breaker designed to deliver dependable overcurrent protection in demanding electrical environments. With a 3-pole configuration, it provides synchronized protection across all three phases, making it an excellent choice for balanced, three‑phase systems.

Designed for panelboards, switchboards, and control panels, this breaker integrates smoothly into industrial, commercial, and OEM applications where safe operation and reliable interruption of fault currents are critical. It helps prevent equipment damage, reduces the risk of downtime, and supports safer, more predictable electrical performance in mission‑critical environments.

Key specifications

• Current rating: 80 A
• Poles: 3-Pole
• Breaker type: Circuit Breaker

Why this 3-pole design matters

In three-phase systems, a 3-pole breaker like the QOU380 protects all phases simultaneously. This reduces the likelihood of phase imbalances, simplifies wiring in motor control centers, and ensures coordinated tripping when a fault occurs. The result is more reliable protection for motors, pumps, conveyors, HVAC equipment, and other three‑phase loads.

Ideal use cases

• Industrial machinery and production lines where consistent 3‑phase protection is required
• Commercial distribution panels and switchboards needing robust, reliable overcurrent protection
• OEM assemblies that demand a dependable, easily integrable 80A, 3‑pole solution
• Motor control centers and other centralized control panels where protecting multiple feeders matters most

Practical considerations and installation tips

When substituting or installing the QOU380, verify compatibility with your panel’s bus arrangement and mounting style, and ensure the system’s voltage and interrupting requirements align with the application. Use industry-standard protective devices in like-for-like configurations to maintain coordinated protection and simplified maintenance. Regular inspection of the enclosure, connections, and mounting hardware will help sustain reliable operation over the breaker’s service life.

In summary, the Square D QOU380 80A 3-Pole Circuit Breaker offers precise, dependable protection for three-phase systems in a variety of settings. It’s a strategic choice for engineers and facility managers seeking to enhance reliability, safety, and uptime in distribution panels and motor control centers.