Square D QO240CP - 40 A, 240 V, 2-Pole Plug-In Circuit Breaker | AmpState

Square D QO240CP is a 40A, 240V, 2-pole plug-in molded case circuit breaker built for reliable branch circuit protection in panelboards and load centers. Designed to snap into place with a fast plug-in connection, it streamlines installation and simplifies replacements, helping you reduce downtime on service upgrades or maintenance.

• Fast plug-in connection for quick installation and effortless replacement in compatible panelboards and load centers.
• Thermal-magnetic trip unit delivers stable, repeatable protection by responding to both overloads and short circuits, minimizing nuisance trips and protecting wiring and devices.
• OEM-compatible—specifically designed to pair with matching Square D OEM load centers and panelboards for seamless performance and reliable protection.
• 2-pole, 40A, 240V configuration provides robust protection for multi-wire branch circuits and higher-draw appliances, reducing the risk of electrical faults across circuits.
• Plug-in mounting simplifies upgrades, service work, and future panel maintenance without the need for tools beyond standard equipment used in panel installations.

This breaker is ideal for residential, commercial, and light industrial applications where dependable overcurrent and short-circuit protection is essential. Use it to protect branch circuits feeding electrical outlets, lighting, HVAC equipment, and small peak-demand loads within a shared panelboard or loadcenter. Its compatibility and plug-in design enable quick exchanges during routine panel servicing, helping you keep critical electrical systems online with minimal downtime.

Why choose the Square D QO240CP

Unlike generic or one-size-fits-all solutions, the QO240CP is purpose-built for the Square D QO family, ensuring accurate tripping behavior, reliable electrical isolation, and predictable performance that aligns with standard panelboard configurations. The combination of a thermal-magnetic trip and a plug-in mount delivers precise protection tailored to continuous duty environments—from quiet residential basements to bustling commercial spaces.

Technical specifications

• Manufacturer: Square D
• Part Number: QO240CP
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 40A
• Voltage Rating: 240V
• Number of Poles: 2
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Pro tip: When installing or replacing with the QO240CP, verify that the panelboard is designed for plug-in breakers in the QO series and ensure the correct slot is used. For best results, pair with matching QO load centers to maintain consistent protection characteristics and labeling accuracy across your electrical distribution system.