Square D QOB120DF 20A 1P 120V Circuit Breaker, Dual-Function, Bolt-On | AmpState

Meet the Square D QOB120DF 20A 1P 120V Dual-Function Bolt-On Circuit Breaker — a dependable, everyday solution for protecting electrical distribution in panelboards, load centers, and panels. Built for retrofit work and maintenance planning, this part is ideal when your project demands a consistent part number for smooth ordering and service records.

Why this breaker stands out

• Dual-function thermal-magnetic protection provides reliable overcurrent and short-circuit response in a single, compact device.
• 1 pole, 20 A, 120 V configuration matches common branch-circuit needs for lighting, outlets, and small appliances.
• Bolt-on mounting designed for secure, mechanical fit in compatible Square D panels, making retrofit installations straightforward where plug-on options aren’t suitable.
• Panel compatibility specifically geared for use in Square D panelboards and load centers that accept QOB bolt-on breakers.
• Part-number stability supports maintenance planning and fleet stocking, reducing mix-ups in ongoing electrical work.
• AmpState availability means you can check fit and compatibility and get this part when you need it.

Use cases and practical scenarios

This breaker is well-suited for retrofit projects where a consistent part number matters, such as upgrading or replacing a failed 20A circuit in existing Square D installations, or stocking maintenance inventories for facilities that rely on predictable, repeatable components. If your panel requires a bolt-on, 1-pole, 120V protection device, the QOB120DF aligns with your wiring plans without introducing compatibility surprises.

How it compares to alternatives

Compared to plug-on styles, bolt-on breakers like the QOB120DF offer a secure mounting option that can be advantageous in retrofit scenarios where panel access or mounting conditions favor a bolt-on approach. The dual-function design delivers reliable protection in a single device, helping you simplify panel maintenance and reduce the variety of parts you need to stock.

Ready to confirm fit or need help verifying compatibility with your panel? AmpState can assist in ensuring you’ve chosen the right part number for your specific Square D system.