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Square D QO120 - 20A 1-Pole Thermal Magnetic Circuit Breaker

Square D
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Square D QO120 is a single-pole, plug-in molded case circuit breaker designed to provide reliable overcurrent protection for 120/240V AC branch circuits. It features a 20A current rating and a 10kA interrupting capacity at 240V AC, utilizing a thermal-magnetic trip mechanism for both long-time and instantaneous protection. The compact unit measures 76 mm H x 19 mm W x 74 mm D, weighs 0.27 lb, and is constructed with a pressure plate terminal connection for wires sized from 14 to 8 AWG. It is fully compliant with UL, CSA, and HACR standards for safety and is rated for operation in temperatures from -25°C to 70°C. This breaker is engineered for installation in Square D QO load centers and NQ panelboards within residential and light commercial electrical systems.

Key Features & Specifications
  • Type: Standard, Thermal Magnetic, Molded Case Circuit Breaker
  • Voltage Rating: 120/240V AC
  • Current Rating: 20A
  • Dimensions: 3.0 in (76 mm) H x 0.7 in (19 mm) W x 2.9 in (74 mm) D
  • Standards: UL Listed, CSA Certified, HACR, Switch Duty
  • Applications: Branch circuit protection in QO Load Centers and NQ Panelboards
  • Switch Type: Circuit Breaker
  • Configuration: Plug-In
  • Temp Rating: -25°C to 70°C (-13°F to 158°F)
  • Phase: 1
  • AIC Rating: 10kA @ 240V
  • Connection: Plug-In
  • Poles: 1
  • Protection: Thermal Magnetic
  • Functions: Long-Time and Instantaneous (LI)
  • Frame Size: 100A/QO
  • Trip Type: Thermal Magnetic
  • Panel Type: QO Load Centers and NQ Panelboards
  • Breaker Type: Standard
  • MCM Size: Min. 14 AWG, Max. 8 AWG
  • Mounting: Plug-In
  • Wire Size: 14 AWG to 8 AWG (Copper or Aluminum)
  • Certification: HACR, Switch Duty, UL Listed
  • Circuit Breaker Mounting Style: Plug-In
  • Terminal Connection: Pressure Plate
  • Frequency Rating: 50/60 Hz
  • Phase Connection: Single Phase
  • Standards: UL 489, CSA C22.2
  • Compatible Frames: QO Series
  • Installation Type: Plug-In
  • Breaker Frame: QO
  • Current Rating: 20A
  • Operating Temperature Maximum Celsius: 70°C
  • Weight: 0.27 lb


Product Identification
  • UPC: 785901400103
  • GTIN: 00785901400103