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Square D QO240SWN - 2-Pole Plug-In Breaker (40A, 10kA AIC)

Square D
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Square D QO240SWN is a molded case circuit breaker designed for providing reliable overcurrent protection in single-phase 120V AC electrical systems. It features a 40A current rating and a 10kA interrupting capacity at 120V, housed within a compact plug-in unit measuring 79 mm H x 38 mm W x 74 mm D and weighing 0.659 lb. The breaker utilizes a thermal-magnetic trip mechanism for both long-time and instantaneous protection and is constructed for operation in temperatures from -25°C to 70°C. It is engineered for compatibility with #8 to #2 AWG aluminum or copper conductors, making it suitable for a range of residential and light commercial panel applications.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal-Magnetic Protection, Plug-In Connection
  • Voltage Rating: 120V 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: Designed to meet applicable industry standards
  • Applications: Residential and light commercial electrical distribution panels
  • Switch Type: Integrated Trip Mechanism
  • Configuration: Plug-In
  • Temp Rating: -13 to 158 °F (-25 to 70 °C)
  • Phase: 1
  • AIC Rating: 10kA @ 120V
  • Connection: Plug-In
  • Poles: 2
  • Protection: Thermal Magnetic
  • Functions: Long Time and Instantaneous Trip
  • Wire Size: #8 to #2 AWG Aluminum/Copper
  • Weight: 0.659 lb


Product Identification
  • GTIN: 00785901763468