Siemens Q320 20A 3P Circuit Breaker, Plug-On | AmpState

Siemens Q320 20A 3P Plug-On Circuit Breaker is built for everyday electrical work, delivering dependable circuit protection in panelboards, load centers, and electrical distribution systems. Designed with retrofit and maintenance in mind, this part maintains a consistent part number for seamless replacements and minimal project disruption.

Why the Q320 stands out

• Plug-On installation enables quicker swaps and reduces service interruptions by simplifying mounting in compatible panelboards and load centers.
• Three-pole design delivers balanced protection across all phases, making it ideal for three‑phase electrical setups where reliable protection matters most.
• 20 ampere rating targets common branch circuits and everyday load scenarios without oversizing protective coverage.
• Consistent part number (Q320) supports straightforward retrofit planning and inventory control, so you can maintain system continuity without hunting for alternatives.
• Trusted manufacturer Siemens brings decades of distribution and protection expertise to your electrical panel.
• Support from AmpState to confirm fit and compatibility, helping you verify that this breaker matches your panel or distribution needs.

Practical applications and use cases

Ideal for contractors performing retrofit work, facility managers overseeing panel upgrades, and maintenance teams that require dependable replacements without changing existing configurations. Use the Siemens Q320 to restore protected circuits quickly after renovations, inspections, or component upgrades, all while preserving a consistent part number across your project.

Specifications at a glance

• Part Number: Q320
• Manufacturer: Siemens
• Product Type: Circuit Breaker
• Amperage: 20 A
• Poles: 3
• Plug-On: Yes (for quick mounting in compatible panels)

What problems does this solve?

By using the Q320 in compatible Siemens panelboards and load centers, you gain reliable overcurrent protection with a predictable, repeatable part number for maintenance and replacements. The plug-on design supports faster installations, helping you minimize downtime on critical electrical projects.

Need help confirming compatibility before you buy? Message AmpState and we’ll verify fit for your specific panel or distribution setup.