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Square D QO145 - 1-Pole 45A Circuit Breaker (10kA AIC)

Square D
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Square D QO145 is a single-pole molded case circuit breaker designed for providing reliable overcurrent and short-circuit protection in residential and light commercial electrical panels. It features a 45A current rating and a 240V AC voltage rating, housed in a compact plug-in unit measuring 79 mm H x 19 mm W x 74 mm D and weighing 0.28 lb. The breaker utilizes a thermal-magnetic trip mechanism for both long-time delay and instantaneous (LI) protection, achieving an interrupting capacity of 10kA at 240V. It is UL Listed and CSA Certified, ensuring compliance with North American safety standards for integration into compatible QO series load centers.

Key Features & Specifications
  • Type: Molded Case, Thermal Magnetic, Plug-In Connection
  • Voltage Rating: 240V AC
  • Current Rating: 45A
  • Dimensions: 3.1 in (79 mm) H x 0.7 in (19 mm) W x 2.9 in (74 mm) D
  • Standards: UL Listed, CSA Certified
  • Applications: Residential & Light Commercial Panel Protection
  • Switch Type: Circuit Breaker
  • Configuration: Single-Pole
  • AIC Rating: 10kA @ 240V
  • Phase: 1
  • Protection: Thermal Magnetic
  • Functions: Long-Time and Instantaneous (LI)
  • Connection: Plug-In
  • Poles: 1
  • Family: QO Series
  • Country of Origin: Mexico
  • Weight: 0.28 lb


Product Identification
  • UPC: 785901012009
  • GTIN: 00785901012009