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Square D QO290 - 90A Circuit Breaker (10kA AIC, 2-Pole)

Square D
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Square D QO290 is a molded case circuit breaker designed for providing reliable overcurrent protection in residential and light commercial electrical systems. It features a 90A current rating and a 120/240V AC voltage rating, housed in a compact plug-in unit measuring 89 mm H x 38 mm W x 74 mm D and weighing 0.7 lb. This thermal-magnetic breaker with a 10kA interrupting rating at 240V is CSA certified, UL Listed, and HACR approved for air conditioning and heating equipment. It is engineered for installation in QO load centers and NQ panelboards, utilizing lug terminals to accommodate copper or aluminum conductors from AWG 4 up to 300 MCM.

Key Features & Specifications
  • Type: Standard, thermal-magnetic molded case circuit breaker with long-time and instantaneous (LI) trip functions
  • Voltage Rating: 120/240V AC
  • Current Rating: 90A
  • Frame Size: 100A/QO
  • Poles: 2
  • Connection: Plug-In
  • Terminal Connection: Lug
  • AIC Rating: 10kA @ 240V
  • Phase: 1
  • Wire Size: AWG 4 to AWG 2/0, Copper or Aluminum; MCM Size: 1/0 AWG to 300 MCM
  • Panel Type: QO Load Centers and NQ Panelboards
  • Protection: Thermal Magnetic
  • Standards & Certification: CSA Certified, HACR, UL Listed
  • Operating Temperature: -25 to 70 °C (-13 to 158 °F)
  • Dimensions: 89 mm H x 38 mm W x 74 mm D (3.5 in x 1.5 in x 2.9 in)
  • Weight: 0.7 lb


Product Identification
  • UPC: 78590150131
  • GTIN: 00785901501312