Square D QOU290 - 90 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

The Square D QOU290 is a dependable 90A, 240V, 2-pole bolt-on molded case circuit breaker designed for robust branch circuit protection in panelboards and load centers. Built for steady, repeatable performance, it delivers confident protection where it matters most in residential, commercial, and light industrial settings.

Why this breaker stands out

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection that stays tight through equipment start-ups and daily operation, reducing the risk of loose connections and intermittent trips.
• Thermal-magnetic trip unit delivers stable, repeatable overcurrent and short-circuit protection, reacting quickly to faults while minimizing nuisance trips for normal load conditions.
• 2-pole design, 90A at 240V precisely matches common branch circuit needs, from multi-wire branch circuits to critical loads in panelboards and load centers.
• OEM-compatible—designed to pair with matching Square D OEM load centers and panelboards for straightforward, reliable replacements and upgrades.

Practical applications and use cases

Use the QOU290 wherever you need trusted, dedicated protection for a pair of hot conductors sharing a neutral in a single enclosure. It’s ideal for:

• Residential service panels upgrading or replacing aging breakers to restore reliable protection.
• Commercial lighting and receptacle circuits where consistent trip performance matters for safety and uptime.
• Light industrial control panels requiring a sturdy, bolt-on solution that won’t loosen under vibration.

Installation and compatibility at a glance

• Mounting style: Bolt-on, enabling a solid attachment to the bus and panel structure.
• Type: Thermal-magnetic molded case circuit breaker for precise protection characteristics.
• Poles: 2-pole configuration to protect paired conductors and shared neutrals where applicable.
• Voltage and current ratings: 240V, 90A, matching common commercial and residential load requirements.
• Applications: Branch circuit overcurrent and short-circuit protection in panelboards and load centers.

Why choose the Square D QOU290 for your panel

Choosing a breaker that pairs with your OEM panel and delivers predictable protection is crucial for system reliability. The QOU290’s bolt-on design minimizes movement-induced wear, while the thermal-magnetic mechanism provides dependable trips that help you avoid downstream damage and downtime. For facilities aiming to maintain code-compliant, safe electrical distribution without frequent replacements, this breaker offers a focused, durable solution.

Whether you’re performing a panel upgrade, conducting routine electrical maintenance, or stocking a service vehicle with a trusted replacement, the Square D QOU290 delivers targeted protection for essential circuits with nothing extraneous—just reliable performance where you need it most.