Square D QOU125 - 25 A, 120 V, 1-Pole Bolt-On Circuit Breaker | AmpState

Protect every branch circuit with precision using the Square D QOU125 25A, 120V, 1-pole bolt-on molded-case circuit breaker. Designed for dependable overcurrent and short-circuit protection in panelboards and loadcenters, this unit delivers a secure connection, reliable trips, and OEM-compatible performance in a compact package.

Why the QOU125 stands out

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection that stays solid through start-up and operation, reducing the risk of loose connections and nuisance trips.
• Thermal-magnetic trip unit combines fast magnetic response to short circuits with thermal protection for gradual overloads, delivering stable, repeatable protection performance.
• OEM-compatible design is engineered to work with matching loadcenters and panelboards, making replacements and upgrades straightforward and dependable.
• Versatile application suitable for residential, commercial, and light industrial electrical layouts, from lighting and receptacle circuits to small equipment and control lines.

Key specifications at a glance

• Manufacturer: Square D
• Part Number: QOU125
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 25 A
• Voltage Rating: 120 V
• Number of Poles: 1
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

Use the QOU125 when you need reliable protection for individual branch circuits in panelboards and loadcenters. It’s well-suited for:

• Residential circuits such as lighting and outlets that require dedicated 25 A protection
• Commercial installations for small equipment or vending and office circuits
• Light industrial setups where robust, vibration-resistant mounting matters

Practical considerations and setup tips

• Ensure compatibility with your existing panelboard or loadcenter and replace like-for-like 1-pole breakers to preserve system protection characteristics.
• Follow standard electrical practices for bolt-on breakers, including proper torque on mounting hardware and secure bus connections to maintain dependable operation.
• Use within its rated environment and electrical specifications to achieve optimal protection for your branch circuits.

With the Square D QOU125, you gain a dedicated, easy-to-install solution that delivers precise protection for 25 A circuits at 120 V while maintaining compatibility with a broad range of panelboards and loadcenters. It’s a thoughtful choice for builders, electricians, and facility managers who value reliability, compatibility, and straightforward protection for everyday electrical needs.