Square D QOB125 - 25 A, 120 V, 1-Pole Bolt-On Circuit Breaker | AmpState

Meet the Square D QOB125 — a 25 A, 120 V, 1-pole bolt-on molded case circuit breaker designed to deliver reliable branch circuit protection in panelboards and load centers. Built for residential, commercial, and light industrial environments, this unit blends seamless compatibility with Square D OEM panels with a rugged, vibration-resistant bolt-on mounting for a dependable bus connection.

Key reasons to choose the Square D QOB125

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, reducing the risk of loose contacts and inconsistent protection in demanding environments.
• Thermal-magnetic trip unit delivers stable, repeatable protection against overcurrent and short-circuit conditions, helping protect wiring and connected devices from damage.
• 1-pole, 25 A at 120 V configuration is ideal for individual branch circuits such as lighting, receptacles, and smaller equipment feeders that need reliable protection without over-sized breakers.
• OEM compatibility works with matching Square D load centers and panelboards, making replacements straightforward and stock-keeping simple for service crews and DIY projects alike.
• Versatile applications suited for residential, commercial, and light industrial settings where a compact, dependable 25 A protection device is required.

The QOB125 is purpose-built for scenarios where secure mounting and precise trip behavior matter most. Whether you’re upgrading a panel during a remodel, replacing a failed breaker, or provisioning a new circuit in an existing Square D system, this 25 A, 120 V, 1-pole bolt-on breaker delivers predictable performance when it matters most.

Use cases and practical guidance

• Replacing a worn or malfunctioning breaker in Square D panelboards or load centers that require a bolt-on solution for a tight bus connection.
• Protecting individual 120 V branch circuits such as lighting runs, receptacle circuits, or small equipment feeds on residential or light commercial installations.
• Retrofit or upgrade projects where consistent thermal-magnetic protection and panelboard OEM compatibility simplify inventory and installation.

Technical snapshot

• Manufacturer: Square D
• Part number: QOB125
• 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

When you need reliable, panel-friendly protection that threads neatly into your existing Square D ecosystem, the QOB125 stands out. It pairs a robust bolt-on design with a predictable thermal-magnetic trip, delivering safety, reliability, and ease of installation for everyday electrical work.