Siemens Q3020 20A 1P 120V Circuit Breaker, Plug-On | AmpState

Meet the Siemens Q3020 20A 1P 120V Plug-On Circuit Breaker—the trusted protection you need for residential and light commercial electrical distribution. Designed for panelboards and load centers, it delivers reliable overcurrent protection for circuits at 120V, with a plug-on design that makes installation straightforward and fast.

Why this matters: when you’re replacing a failed breaker or stocking spares, it’s essential to keep your BOM aligned to the original part number. The Q3020 is purpose-built for that exact workflow, helping you source the right component quickly and maintain consistency across your electrical distribution system.

Key specifications

• Amperage: 20 A
• Poles: 1-Pole
• Voltage: 120V
• Type: Plug-On Circuit Breaker
• Manufacturer/Part Number: Siemens Q3020
• Applications: Panelboards, load centers, electrical distribution systems

What makes it stand out

With its plug-on design, the Q3020 enables quick, secure connections to your Siemens panelboard wiring, reducing installation time and potential wiring errors. Its 20-amp rating makes it well-suited for lighting circuits, receptacle circuits, and general-purpose branches that require consistent protection at 120V. Keeping this specific part in your stock ensures you’re always aligned with the original equipment manufacturer (OEM) configuration, which simplifies procurement and maintenance workflows.

Ideal for

• Technicians performing panelboard replacements or upgrades
• Facilities managers maintaining electrical distribution in small to mid-size facilities
• Residential electricians stocking BOM-aligned spares for service calls

How it compares to alternatives

Compared to generic, non-OEM-compatible breakers, the Siemens Q3020 offers exact form, fit, and mechanical compatibility with Siemens panelboards and load centers. This alignment minimizes compatibility issues during servicing and helps preserve the intended protection characteristics of your electrical system.

Need help confirming fit or matching a part number? Message AmpState and our team will verify compatibility to ensure you get the right component the first time.

Included with purchase: Siemens Q3020 20A 1P 120V Plug-On Circuit Breaker, ready to install in compatible Siemens panelboards.