Square D QO350 - 50 A, 240 V, 3-Pole Plug-In Circuit Breaker | AmpState

The Square D QO350 is a 50A, 240V, 3-pole plug-in molded‑case circuit breaker designed to deliver reliable branch‑circuit overcurrent and short‑circuit protection within panelboards and loadcenters.

• Fast plug‑in connection for quick installation and effortless replacement, reducing labor time during panel upgrades or circuit repairs.
• Thermal‑magnetic trip unit provides stable, repeatable protection by responding to both overloads and short circuits without nuisance trips during normal surges.
• Designed for seamless compatibility with matching OEM loadcenters and panelboards, ensuring proper fit and coordinated electrical protection.
• Specifically suited for residential, commercial, and light industrial environments where dependable 50A protection is required for 240V circuits.

Technical snapshot

• Manufacturer: Square D
• Part Number: QO350
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 50A
• Voltage Rating: 240V
• Number of Poles: 3
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Ideal for

• Upgrading or expanding panelboards and loadcenters that require a 3-pole, 50A 240V solution
• New installations in residential service equipment or light commercial electrical rooms
• Retrofits in existing systems where fast replacement minimizes downtime

With its plug-in design and OEM-friendly compatibility, the Square D QO350 delivers a reliable, easy-to-service protection solution that keeps electrical systems safe and compliant. If you’re stocking a service van, performing panel upgrades, or configuring a new loadcenter, this 3-pole 50A breaker is a precise, purpose-built choice for robust branch‑circuit protection.