Square D QO240CP – 40 Amp, 2-Pole Circuit Breaker

Overview

The Square D QO240CP is a high-quality two-pole circuit breaker from the QO Series, designed to provide reliable overload and short-circuit protection in residential and light commercial electrical panels. Known for its quick-trip technology and easy installation, this breaker is compatible with Square D QO load centers and provides excellent performance and safety.

Key Features

• Amperage: 40 Amps

• Poles: 2 (double-pole configuration)

• Voltage: 120/240 VAC

• Interrupt Rating: 10,000 AIC (Ampere Interrupting Capacity)

• Trip Type: Thermal-magnetic, with fast-trip mechanism for enhanced protection

• Connection Type: Plug-on design for quick and secure installation in QO load centers

• Conductor Range: Compatible with copper or aluminum wires, typically 8–14 AWG

• Certifications: UL Listed, CSA certified

• Dimensions: Compact size typical for 2-pole breakers, approximately 3” height × 1” width × 3” depth

Benefits

• Reliable and Fast Protection
  Thermal-magnetic design ensures rapid response to electrical faults, minimizing risk of damage.

• Easy Installation
  Plug-on configuration simplifies mounting and replacement in compatible Square D panels.

• Space-Saving Design
  Compact footprint allows efficient use of panel space.

• Durable and Certified
  Built to meet rigorous UL and CSA standards for safety and reliability.

Applications

• Protection of 240V circuits in residential and light commercial settings

• Suitable for HVAC systems, water heaters, subpanels, and large appliances

• Ideal for use in Square D QO load centers for new installations or upgrades

• Circuits requiring dependable two-pole protection with quick-trip technology