The Square D QO240CP Double‑Pole Circuit Breaker is a premium 2‑pole (D‑P) breaker designed to provide reliable overcurrent protection for residential and light commercial electrical systems. As part of the industry‑leading Square D QO series, this breaker is known for its durability, consistent performance, and clear visual trip indication trusted by electrical professionals.

Rated at 40 amps and approved for 120/240‑volt applications, the QO240CP is ideal for protecting higher‑demand 240‑volt branch circuits. As a double‑pole breaker, it connects to both hot bus bars within the panel and ensures simultaneous tripping of both poles, providing proper protection for 240‑volt loads and meeting electrical safety requirements.

This breaker utilizes a proven thermal‑magnetic tripping mechanism, offering dependable protection against both sustained overloads and instantaneous short circuits. The plug‑on mounting design allows for fast, secure installation in approved Square D QO load centers. Manufactured to Square D’s rigorous quality and safety standards, the QO240CP delivers long‑term reliability and performance in demanding electrical environments.

Key Features

• Double‑pole (2P / D‑P) breaker for 240‑volt applications
• 40‑amp rating for higher‑load branch circuits
• Thermal‑magnetic tripping for reliable overload and short‑circuit protection
• Plug‑on installation for quick, secure mounting
• Trips both poles simultaneously for enhanced safety
• Premium construction from the Square D QO series
• Compatible with Square D QO load centers
• Suitable for new installations or replacement use

Specifications

• Manufacturer: Square D (Schneider Electric)
• Series: QO
• Model Number: QO240CP
• Breaker Type: Double‑Pole (2P / D‑P)
• Number of Poles: 2
• Amperage Rating: 40 Amps
• Voltage Rating: 120/240 VAC
• Tripping Mechanism: Thermal‑magnetic
• Mounting Type: Plug‑on
• Load Center Compatibility: Square D QO load centers
• Application Rating: Branch circuit protection
• Indicator: Square D QO handle with visual trip indication

Applications

• Residential Square D QO electrical panels
• Light commercial load centers
• 240‑volt branch circuits requiring 40‑amp protection
• HVAC equipment, water heaters, and other high‑load appliances
• Replacement of existing Square D QO double‑pole circuit breakers