Square D QOU115 - 15 A, 120 V, 1-Pole Bolt-On Circuit Breaker | AmpState

Square D QOU115 is a 15A, 120V, 1-pole bolt-on molded case circuit breaker designed to protect individual branch circuits in panelboards and load centers. Built for dependable overcurrent and short-circuit protection, this device delivers reliable performance where it matters most in residential, commercial, and light industrial installations.

Why this breaker stands out

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, helping maintain consistent electrical performance in environments where vibration or equipment movement is a factor.
• Thermal-magnetic trip unit delivers stable, repeatable protection by combining slow-acting thermal monitoring for overloads with instantaneous magnetic trip for short circuits—reducing nuisance trips while safeguarding circuits.
• OEM-compatible design is specifically intended to fit with matching Square D OEM load centers and panelboards, ensuring proper coordination and easy integration into existing electrical systems.
• Versatile, application-ready protection ideal for residential panelboards, commercial distribution boards, and light industrial installations where reliable single-pole protection is needed.

Technical snapshot

• Manufacturer: Square D
• Part number: QOU115
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 15A
• Voltage rating: 120V
• Number of poles: 1
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

• Seasoned electricians upgrading or expanding residential panelboards to add dedicated 15A circuits for lighting or outlets.
• Small commercial distribution boards needing compact, reliable one-pole protection for individual branches.
• Light industrial setups where bolted connections and robust protection are prioritized in panel assemblies.

How it helps you manage electrical safety

The QOU115 delivers targeted protection for each branch circuit, helping prevent damage from overloads and short circuits. The combination of a thermal element and magnetic trip means the device responds appropriately to sustained overloads while snapping to action during a sudden fault, safeguarding connected equipment and reducing downstream wiring stress.

For installers and property owners, this breaker provides peace of mind through:

• Reliable, repeatable trip performance in varying load conditions
• Compatibility with Square D panelboards and load centers for straightforward replacement and upgrade paths
• Clear, single-pole protection that fits into standard 120V distribution schemes

Choose the Square D QOU115 for precise, dependable 15A protection that integrates smoothly with your existing panel infrastructure.