Square D QO2175 - 175 A, 120 V, 2-Pole Plug-In Circuit Breaker | AmpState

The Square D QO2175 is a 175A, 120V, 2-pole plug-in molded case circuit breaker engineered to protect branch circuits and prevent short circuits in panelboards and load centers. Its fast plug-in connection means quick installation and easy replacement, minimizing downtime during service or upgrades.

At the heart of its performance is a thermal-magnetic trip unit: the magnetic element responds to immediate overcurrents, while the thermal element moderates nuisance trips from daily load variations. The result is stable, repeatable protection you can rely on for years.

Designed to align with matching OEM load centers and panelboards, the QO2175 offers a clean fit, simplified wiring, and coordinated protection across your electrical system. This makes it suitable for residential, commercial, and light industrial applications where robust 2-pole protection is needed.

Technical snapshot

• Manufacturer: Square D
• Part Number: QO2175
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 175 A
• Voltage rating: 120 V
• Number of poles: 2
• Mounting style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Why this breaker is a smart choice

• Fast plug-in connection enables rapid installation and replacement, reducing panel downtime.
• Thermal-magnetic trip unit delivers precise, repeatable protection under varying load conditions.
• OEM-compatible with matching load centers and panelboards for a seamless, code-compliant setup.
• 2-pole design provides balanced protection for two conductors in residential, commercial, or light industrial applications.

Practical use scenarios

• Upgrading a main service panel or subpanel that requires a 2-pole 175A breaker to protect feeders and branch circuits.
• Replacing an aging plug-in breaker in panelboards and load centers within the Square D QO family.
• Protecting heavy appliance or equipment circuits in light commercial environments, where reliable short-circuit protection is critical.

For best performance, pair the QO2175 with compatible Square D load centers and panelboards to ensure proper trip coordination and reliable long-term protection.