Square D QOU290 - 90A, 2-Pole, Circuit Breaker

Meet the Square D QOU290 — a 90A, 2-pole circuit breaker designed for the most demanding electrical environments. Built to protect panelboards, switchboards, and control panels, this unit delivers dependable overcurrent protection where it matters most, helping to keep machines and processes running smoothly.

Why this 2-pole design matters: it safeguards both hot conductors of 240V circuits, enabling coordinated shutdowns and safer operation across distributed power paths. With a 90A rating, it handles higher-current feeders and motor-driven loads while providing a predictable, consistent trip response that technicians rely on in everyday maintenance and during startup surges.

Key specifications

• Current rating: 90A
• Poles: 2-Pole
• Breaker type: Circuit Breaker

Ideal use cases

• Industrial panelboards and motor control centers where robust protection is non-negotiable
• Commercial electrical distribution where space and reliability must align
• OEM equipment housings that require a familiar, plug-in protection device with proven performance

What sets the QOU290 apart

• Trusted Square D ecosystem: Designed to integrate seamlessly with existing Square D enclosures and components, reducing compatibility concerns during upgrades or replacements
• Balanced protection: Two-pole configuration ensures synchronized disconnection of both conductors, enhancing safety in 240V circuits
• Focused on reliability: Engineered for dependable overcurrent protection in distribution panels and motor-driven applications, helping minimize unplanned downtime

Installation and best practices

• Install in appropriate panelboards, switchboards, or control panels that support two-pole protection and the QOU series form factor
• Verify that the application current and load profile align with the 90A rating to avoid nuisance trips
• Inspect mounting and bus bar connections for secure, solid contact to ensure consistent operation over time
• Follow standard safety protocols for servicing live electrical equipment and consult the panel’s documentation for any enclosure-specific guidance

Whether you’re upgrading an aging distribution scheme or stocking OEM builds, the Square D QOU290 delivers clear, purpose-driven protection for critical feeders and motor circuits. Add it to your cart to secure reliable, scalable overcurrent protection in your next installation.