Square D QO320GFI - 20 A, 240 V, 3-Pole Plug-In Circuit Breaker | AmpState

Introducing the Square D QO320GFI — a rugged 20A, 240V, 3-pole plug-in molded case circuit breaker designed to deliver reliable branch circuit protection in panelboards and load centers. This QO320GFI model blends a fast plug-in connection with a thermal-magnetic trip unit, providing stable, repeatable protection against both overloads and short circuits.

Why this breaker stands out

• Fast plug-in installation — minimizes downtime during replacement or upgrades in panelboards and load centers.
• Thermal‑magnetic trip — combines temperature-based and magnetic response to deliver precise, dependable protection across varying electrical loads.
• 3-pole, 240V, 20A configuration — ideal for multi‑wire or 3‑phase circuits in residential, commercial, and light industrial settings.
• Molded‑case, plug‑in design — compact, sturdy housing engineered for compatibility with OEM load centers and panelboards.
• OEM compatibility — crafted to pair with matching Square D panels for smooth installation and reliable performance.
• Versatile applications — suitable for a range of environments from home electrical panels to small commercial setups and light industrial equipment.

Technical specifications

• Manufacturer: Square D
• Part Number: QO320GFI
• 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

Ideal use cases and scenarios

Use the QO320GFI in panelboards and load centers where a robust 3‑pole solution is needed to protect 240V circuits. It’s well suited for multi‑wire branch circuits in residential basements, commercial electrical rooms, and light industrial equipment feeds. If you’re upgrading an aging panel or replacing a tripped breaker, this plug‑in unit offers a straightforward swap that minimizes downtime and maintains consistent protection performance.

What you gain with this model

With the Square D QO320GFI, you’re choosing a dependable, industry‑standard breaker that delivers:

• Clear protection with a reliable thermal‑magnetic trip curve that responds predictably to overloads and short circuits.
• Simple maintenance and faster service thanks to a plug‑in design that simplifies installation and replacements.
• Confidence in compatibility across OEM panelboards and load centers for a unified electrical system.