Siemens Q320 - 20 A, 240 V, 3-Pole Plug-In Circuit Breaker | AmpState

Meet the Siemens Q320—a 20A, 240V, 3-pole plug-in molded case circuit breaker built to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. Designed for streamlined installation and consistent protection performance, it’s the practical choice for modern electrical layouts.

Why the Siemens Q320 stands out

• Fast plug-in connection: Quick installation or replacement minimizes downtime during panel upgrades or service work, keeping projects on schedule.
• Thermal-magnetic trip unit: Provides stable, repeatable protection by responding to overloads with precise thermal sensing and delivering instantaneous magnetic trips for short circuits.
• OEM-compatible: Specifically designed to fit with matching Siemens loadcenters and panelboards, ensuring reliable fit and proper operation.
• Versatile for multiple settings: Suitable for residential, commercial, and light industrial applications that require robust 3-pole protection in a compact plug-in form.

Key specifications at a glance

• Manufacturer: Siemens
• Part Number: Q320
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 20A
• Voltage Rating: 240V
• Number of Poles: 3
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Practical use cases

Use the Siemens Q320 in panelboards and loadcenters where reliable three-pole protection is needed—for example, dedicated circuits in residential installations, small commercial outlets, or light industrial equipment feeds. Its plug-in design simplifies field replacements and upgrades, reducing labor time and potential wiring errors compared with more involved mounting methods.

Tips for optimal results

• Ensure the breaker is fully seated in the bus and panel chassis to guarantee proper trip operation.
• Match the 3-pole configuration to your panel’s available spaces and intended fault-current protection requirements.
• Keep the surrounding enclosure clean and dry to maintain reliable performance over time.