Square D QO120EPD 20A 1P 120V Circuit Breaker, QO, GFCI, Plug-On | AmpState

Meet the Square D QO120EPD—a 1-pole, 20A 120V GFCI circuit breaker engineered for fast, reliable protection in panelboards, load centers, and electrical distribution networks. Designed to drop directly into QO-series panels, this plug-on device provides precise ground-fault protection where it matters most, making it a smart choice for maintenance teams, panel builders, and stock inventories that require an exact part-number match.

Key advantages

• GFCI protection with plug-on convenience—built-in ground-fault protection plus quick, tool-free installation to minimize downtime.
• 1-pole, 20A, 120V configuration—ideal for branch circuits that demand reliable protection without changing existing wiring plans.
• Direct part-number match for seamless compatibility with Square D QO panelboards and load centers, reducing guesswork during replacements.
• Versatile application suitable for electrical distribution in residential, commercial, and light-industrial settings where moisture or splash risks exist or where shock protection is important.
• Backed by AmpState—a practical option when you need help confirming fit or locating the exact part number for your project.

Where to use

Choose the QO120EPD for circuits that require ground-fault protection in areas like kitchens, garages, basements, outdoor spaces, or any location where accidental ground faults pose a safety concern. It’s designed to complement existing QO panelboards and load centers, delivering consistent performance in everyday electrical distribution tasks.

Technical specifications

• Manufacturer: Square D
• Part Number: QO120EPD
• Type: GFCI Plug-On
• Amperage: 20 A
• Poles: 1
• Voltage: 120V
• Application: Circuit protection in panelboards, load centers, and electrical distribution
• Category: QO series circuit breaker

Why this makes sense for your project

If you’re stocking spare parts for panel builds or performing maintenance on existing systems, the QO120EPD provides a reliable, code-ready solution with dedicated ground-fault protection. Its plug-on design minimizes installation time, while the 1-pole, 20A rating fits common circuits without requiring rework. By choosing a genuine Square D device, you’re aligning with widely used QO infrastructure, simplifying future replacements and service calls.

Purchase with confidence

Need help confirming fit or mapping the exact part for your panel configuration? AmpState is ready to assist. Reach out to verify compatibility and ensure you’re ordering the precise QO120EPD needed for your specific panelboard or load center setup.