Square D QO120DF 20A 1P 120V Circuit Breaker, AFCI, GFCI, Dual-Function, Plug-On | AmpState

The Square D QO120DF is a compact, plug-on circuit breaker that brings dual protection to 120V circuits—AFCI and GFCI—in a single 1-pole, 20A device. Designed for panelboards, load centers, and broader electrical distribution, it’s an ideal direct part-number match for quick replacements and dependable performance in professional installations.

Why choose the QO120DF? It delivers two essential safeguards in one slim package, simplifying panel layouts while enhancing safety for everyday wiring projects. This is particularly valuable for maintenance teams, panel builders, and inventory planners who value precise fit and reliable operation.

• Dual-function protection—arc-fault protection helps prevent fires caused by deteriorated insulation or loose connections, while ground-fault protection helps prevent shock on outlets and receptacles. One device handles both risks without needing separate breakers.
• Plug-On convenience—engineered for easy installation into Square D QO panels with a secure, straightforward plug-on design that minimizes labor and mis-wiring during replacement.
• Straightforward specs—1-pole, 20A, 120V configuration that fits standard branch-circuit requirements commonly found in residential and light commercial electrical layouts.
• Exact part-number fit—QO120DF is the precise choice when a direct replacement is required in QO-series panelboards and distribution setups.
• Trusted source—backed by Square D’s reputation for reliability, with AmpState offering clear availability and support for compatibility checks.

Who is this ideal for? Electricians and maintenance crews stocking a spare-part kit, panel builders assembling new or retrofit systems, and facility managers seeking a robust, dual-protection breaker that simplifies procurement and ensures consistent performance.

Practical use cases and tips:

• Install on circuits that require both arc-fault and ground-fault protection—such as outlets near kitchens, bathrooms, garages, and outdoor areas—where multiple risk factors exist.
• When replacing an existing 20A, 120V breaker in a QO panel, verify the part-number match to ensure seamless compatibility and a clean panel appearance.
• After installation, use the breaker’s built-in Test button to verify both AFCI and GFCI protections are functioning correctly. Label the circuit to reflect dual protection for future technicians.

Need help confirming fit? AmpState provides support to verify compatibility and ensure you’re selecting the exact part-number match for your panel configuration. Message us and we’ll help you confirm fit.