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Square D QO340SWN - 40A 2-Pole Circuit Breaker (240V)

Square D
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The Square D QO340SWN is a 40A, 2-pole molded case circuit breaker from the QO Series, designed to provide overcurrent protection for branch circuits in residential and commercial load centers. This thermal-magnetic breaker is rated for 240V AC with a 10kA interrupting capacity at 240V, utilizing LI (Long-Time and Instantaneous) trip functions for precise fault response. The plug-in connection and compact dimensions of 3.1 in (79 mm) x 2.2 in (57 mm) x 2.9 in (74 mm) (H x W x D) allow for straightforward installation in compatible QO panels, with a weight of 1.25 lb. It complies with industry standards for single-phase applications, ensuring reliable protection against sustained overloads and short circuits. Typical industrial applications include lighting, appliance, and general-purpose branch circuits in panelboards requiring a 40A, 2-pole configuration.

Key Features & Specifications
  • Type: QO-SW Molded Case Circuit Breaker
  • Voltage Rating: 240V AC
  • Current Rating: 40A
  • Dimensions: 3.1 in (79 mm) x 2.2 in (57 mm) x 2.9 in (74 mm) (Height x Width x Depth)
  • Weight: 1.25 lb
  • Poles: 2
  • Phase: 1
  • Connection: Plug-In
  • Protection: Thermal Magnetic
  • AIC Rating: 10kA@240V
  • Functions: LI - Long-Time and Instantaneous
  • Family: QO Series
  • Item Subcategory: Molded Case
  • Country of Origin: Mexico