Square D QO350GFI - 50 A, 240 V, 3-Pole Plug-In Circuit Breaker | AmpState

Square D QO350GFI is a 50‑amp, 240‑volt, 3‑pole plug‑in molded‑case circuit breaker with built‑in ground fault protection. Designed for dependable branch‑circuit overcurrent and short‑circuit protection in panelboards and load centers, this device delivers safety and speed when it matters most.

• Fast plug‑in connection enables quick installation and easy replacement in existing OEM load centers and panelboards, minimizing downtime.
• Thermal‑magnetic trip unit provides stable, repeatable protection across changing loads and conditions, reducing nuisance trips and safeguarding connected equipment.
• GFI/ground‑fault protection adds an essential layer of safety by detecting ground faults and interrupting power to prevent shock hazards on branch circuits.
• 3‑pole, 50A, 240V configuration supports multi‑wire and three‑phase style circuits common in commercial and light‑industrial environments.
• OEM compatibility designed to work with matching Square D/QO load centers and panelboards, preserving performance and simplifying stocking.

Ideal applications

• Residential panels requiring robust protection for larger 240V circuits and multi‑wire branch circuits.
• Commercial and light‑industrial panelboards that demand reliable 50A protection with fast maintenance cycles.
• Retrofits and replacements where a plug‑in solution minimizes downtime while maintaining panel topology.

Technical snapshot

• Manufacturer: Square D
• Part number: QO350GFI
• Type: Thermal‑magnetic molded case circuit breaker with GFI functionality
• Amperage: 50A
• Voltage: 240V
• Poles: 3
• Mounting: Plug‑in
• Application: Branch‑circuit overcurrent and short‑circuit protection

Practical guidance for use

• Confirm panel compatibility with the QO series to ensure seamless plug‑in fit and trip characteristics.
• Match the breaker rating to the protected circuit’s load to prevent unnecessary trips while ensuring adequate protection.
• Follow electrical codes and standards, keeping a spare QO350GFI on hand for swift replacement during service windows.

With its combination of rapid installation, reliable thermal‑magnetic protection, and built‑in ground fault interlock, the Square D QO350GFI delivers trustworthy protection for essential circuits in homes, businesses, and light industrial settings.