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Square D QO240H - 2-Pole Circuit Breaker 40A 240V (10kA AIC)

Square D
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Square D QO240H is a molded case circuit breaker designed for providing reliable overcurrent and short-circuit protection in residential and light commercial electrical panels. It is rated for 40A at 240V AC in a single-phase system, featuring a compact plug-in design with dimensions of 79 mm H x 38 mm W x 74 mm D and a thermal-magnetic trip mechanism for both long-time delay and instantaneous (LI) protection. Constructed for durability, it operates within a temperature range of -25 to 70 °C, accepts wire sizes from AWG 8 to 2, and carries UL and CSA certifications for safety compliance. This two-pole breaker is commonly applied to protect dedicated appliance circuits, such as those for electric dryers or HVAC equipment, with an interrupting capacity of 10kA at 240V.

Key Features & Specifications
  • Type: Molded Case, Thermal Magnetic Protection, Plug-In Connection
  • Voltage Rating: 240V AC
  • Current Rating: 40A
  • Dimensions: 3.1 in (79 mm) H x 1.5 in (38 mm) W x 2.9 in (74 mm) D
  • Standards: UL Listed, CSA Certified
  • Applications: Residential & Light Commercial Appliance Circuits
  • Switch Type: Circuit Breaker
  • Configuration: Two-Pole
  • Temp Rating: -13–158 °F (-25–70 °C)
  • Phase: 1
  • Amperage: 40A
  • AIC rating: 10kA@240V
  • Connection: Plug-In
  • Poles: 2
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous Trip
  • Wire Size: AWG 8 to AWG 2, Copper/Aluminum
  • Family: QO Series
  • Country of Origin: Mexico
  • Weight: 0.724 lb


Product Identification
  • UPC: 785901096290
  • GTIN: 00785901096290