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Square D QOU140 - Molded Case Circuit Breaker 40A 1-Pole

Square D
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The Square D QOU140 is a single-pole molded case circuit breaker designed to provide reliable overcurrent protection for dedicated branch circuits. It features a 40A current rating and a 120/240V AC voltage rating, housed within a compact 100A frame with dimensions of 102.87 mm H x 19.05 mm W x 74.93 mm D and a weight of 0.37 lb. Constructed with thermal-magnetic trip protection for both long-time and instantaneous (LI) fault conditions, it offers a 10kA interrupting capacity at 120V and operates within a temperature range of -25 to 70 °C. This unit-mount breaker is CSA, IEC, and UL listed, making it suitable for applications in air conditioning, refrigeration equipment, and heating panels, and it accommodates copper or aluminum conductors from 14 AWG to 2 AWG using its slotted box lug terminals.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Standard, Thermal Magnetic Protection
  • Voltage Rating: 120/240V AC
  • Current Rating: 40A
  • Dimensions: 102.87 mm H x 19.05 mm W x 74.93 mm D (4.05 in x 0.75 in x 2.95 in)
  • Weight: 0.37 lb
  • Standards: CSA, IEC, UL Listed
  • Applications: Air Conditioning, Refrigeration Equipment, Heating Panels
  • Switch Type: Circuit Breaker
  • Configuration: Unit Mount
  • Temp Rating: -25 to 70 °C (-13 to 158 °F)
  • Phase: 1
  • AIC Rating: 10kA @ 120V
  • Connection: Slotted Box Lug (Reversible Line and Load)
  • Poles: 1
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous Trip
  • Frame Size: 100A/QOU
  • Breaker Type: Standard
  • Wire Size: 14 AWG to 2 AWG (Aluminium/Copper)
  • Certification: IEC, UL Listed
  • MCM Size: Min. 14 AWG, Max. 2 AWG
  • Terminal Connection: Slotted Box Lug
  • Family: QOU Series


Product Identification
  • UPC: 785901418597
  • GTIN: 00785901418597