Square D QOU110 - 10 A, 120 V, 1-Pole Bolt-On Circuit Breaker | AmpState

The Square D QOU110 is a compact yet dependable solution for protecting your electrical installations with precise, reliable performance. At 10A and 120V, this 1-pole bolt-on molded case circuit breaker is designed to safeguard branch circuits in panelboards and loadcenters against overcurrent and short-circuit events.

Why this design stands out

• Secure bolt-on mounting delivers a rigid, vibration-resistant bus connection that stays tight through normal panel activity, reducing the risk of loose connections and intermittent trips.
• Thermal-magnetic trip unit provides stable, repeatable protection across a wide range of loads, delivering fast response to short circuits while minimizing nuisance trips on inrush or normal operation.
• OEM compatibility is built in—designed to work with matching Square D OEM loadcenters and panelboards for straightforward replacement or upgrades.
• Versatile application suited for residential, commercial, and light industrial environments—from home subpanels to small office equipment rooms.

What problems this breaker solves

When you need reliable branch circuit protection that won’t compromise electrical performance, the QOU110 delivers. Its bolt-on design ensures a solid mechanical connection in panels that experience vibration or movement. The thermal-magnetic trip curve prevents nuisance trips during normal startup surges while still interrupting faults quickly to protect wiring and devices.

Technical specifications at a glance

• Manufacturer: Square D
• Part Number: QOU110
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 10A
• Voltage Rating: 120V
• Number of Poles: 1
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use scenarios

Install the QOU110 in residential panelboards feeding lighting and receptacle circuits, in small to mid-size commercial subpanels, or in light industrial setups where dependable protection and durable mounting matter most. It’s an excellent choice for replacement in aging panels where a bolt-on, OEM-compatible solution is preferred alongside a clean, secure install.

Practical considerations

• Ensure compatibility with your existing Square D OEM loadcenter or panelboard for seamless integration.
• Use appropriate torque on mounting bolts to maintain the integrity of the vibration-resistant bus connection.
• Pair with matching auxiliary components only as recommended by the manufacturer to preserve coordinated protection and trip reliability.