Siemens Q320H - 20 A, 240 V, 3-Pole Plug-In Circuit Breaker | AmpState

Meet the Siemens Q320H — a 3-pole, 20A, 240V plug-in molded case circuit breaker engineered to protect your panelboards and load centers from overcurrent and short circuits with reliable, repeatable performance. Designed for fast installation and straightforward replacements, this unit keeps downtime to a minimum while delivering steady protection for both routine use and demanding conditions.

Key advantages

• Fast plug-in connection for quick installation and seamless replacement, reducing service time during upgrades or maintenance.
• Thermal-magnetic trip unit provides stable, repeatable protection as ambient temperature and load vary, helping prevent nuisance trips and equipment damage.
• 3-pole, 20A, 240V configuration tailored for balanced protection across three conductors in typical residential, commercial, and light industrial circuits.
• Compatibility with matching OEM load centers and panelboards to ensure proper seating, reliable contact, and consistent performance in Siemens-aligned systems.
• Versatile applications suitable for a range of environments—from home electrical upgrades to light commercial or light industrial installations.

Technical details at a glance

• Manufacturer: Siemens
• Part Number: Q320H
• 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

Who should consider the Q320H

This breaker is ideal for electricians and facilities managers who value quick replacement, consistent protection, and OEM-grade compatibility. Use it when upgrading aging panelboards or load centers, wiring new spaces in residential settings, or equipping light-commercial setups where reliable 3-pole protection is essential.

Why this breaker matters

Beyond basic specs, the Q320H delivers a practical, dependable solution for safeguarding circuits without extended downtime. The plug-in design minimizes installation complexity, while the thermal-magnetic trip offers predictable response to overloads and short circuits, helping protect wiring, devices, and downstream equipment across a range of workloads.

Installation and compatibility tips

Install the Q320H in compatible Siemens OEM panelboards and load centers to ensure proper seating and optimal performance. Handle with standard electrical safety practices, and verify that the circuit’s amperage, voltage, and pole configuration match the protected circuit requirements.