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Square D QO245 - 2-Pole 45A Circuit Breaker (10kA AIC)

Square D
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Square D QO245 is a molded case circuit breaker designed for providing reliable overcurrent and short-circuit protection in residential and light commercial electrical systems. It features a 45A current rating and a 120/240V AC voltage rating, housed within a compact, plug-in design measuring 79 mm H x 38 mm W x 74 mm D and weighing 0.57 lb. The breaker utilizes a thermal-magnetic trip mechanism for both long-time delay and instantaneous protection, is CSA certified and UL listed, and is engineered for installation in QO load centers and NQ panelboards.

Key Features & Specifications
  • Type: Standard, molded case, thermal-magnetic protection with LI (Long-time and Instantaneous) trip functions
  • Voltage Rating: 120/240V AC
  • Current Rating: 45A
  • Frame Size: 100A/QO
  • Poles: 2
  • AIC Rating: 10kA @ 240V AC
  • Connection: Plug-in with lug terminals
  • Wire Size: AWG 8 to AWG 2, Copper/Aluminum (MCM: 1/0 AWG min to 300 MCM max)
  • Phase: 1
  • Standards & Certification: CSA Certified, HACR, UL Listed
  • Operating Temperature: -25 to 70 °C (-13 to 158 °F)
  • Dimensions: 79 mm H x 38 mm W x 74 mm D (3.1 in x 1.5 in x 2.9 in)
  • Weight: 0.57 lb
  • Panel Type: Compatible with QO Load Centers and NQ Panelboards


Product Identification
  • UPC: 785901012849
  • GTIN: 00785901012849