Square D QO350EPD 50A 3P 240V Circuit Breaker, GFCI, Plug-On | AmpState

The Square D QO350EPD 50A 3P 240V GFCI Plug-On Circuit Breaker is built for dependable protection in panelboards, load centers, and complex electrical distributions. Designed as a direct part-number match, it’s a smart, ready-to-install solution for maintenance teams, panel builders, and spare inventories where exact fit matters.

Key features that matter in real-world setups

• 50 Amp, 3-Pole, 240V design handles demanding 3-phase circuits with reliable protection.
• GFCI protection integrated into a plug-on breaker to safeguard equipment and personnel against ground faults on protected circuits.
• Plug-On installation for quick, secure mounting in compatible Square D/QO panelboards without complicated wiring.
• Direct part-number match ensures compatibility in assemblies that require specific QO components, reducing guesswork and downtime.
• Ideal for panelboards, load centers, and electrical distribution setups where reliable branch-circuit protection is essential.
• Availability through AmpState, making it easy to source the exact part you need when you need it.

What problems does it solve?

• Prevents electrical shocks on protected circuits by quickly interrupting power when a ground fault is detected.
• Eliminates delivery delays and compatibility headaches with a known part-number match for Square D QO panels.
• Supports precise, codes-compliant protection for critical 240V 3-phase loads in commercial or industrial environments.

Ideal use cases

• New panel installations or upgrades in customer sites that require GFCI protection on 240V circuits.
• Spare inventory for maintenance teams to minimize downtime during service calls.
• Panel builders selecting exact components for reliable, repeatable assembly workflows.
• Retrofits or replacements in existing QO-series distributions where a plug-on GFCI breaker is appropriate.

Need help confirming fit or compatibility with your specific panel? AmpState can assist—just reach out and we’ll verify that the QO350EPD is the right match for your setup.