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Square D QOB345 - 3-Pole Circuit Breaker 45A 120/240VAC

Square D
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Square D QOB345 is a three-pole molded case circuit breaker designed for providing reliable overcurrent protection in three-phase electrical systems. It features a 45A current rating and a 120/240VAC voltage rating, housed within a compact 100A/QO frame measuring 79 mm x 57 mm x 74 mm (H x W x D) and weighing 0.84 lb. The breaker utilizes a thermal-magnetic trip mechanism for both long-time and instantaneous protection, is CSA and UL Listed, and is rated for an interrupting capacity of 10kA at 240V. Its bolt-on connection with pressure plate terminals accommodates copper or aluminum conductors from AWG 8 to AWG 2, making it suitable for installation in Square D NQOD panelboards across commercial and light industrial applications.

Key Features & Specifications
  • Type: Three-pole, molded case, thermal-magnetic circuit breaker with bolt-on connection
  • Voltage Rating: 120/240V AC
  • Current Rating: 45 Amps
  • Frame Size: 100A/QO
  • AIC Rating: 10kA at 240V
  • Poles: 3
  • Phase: 3
  • Connection: Bolt-On
  • Terminal Connection: Pressure Plate
  • Wire Size: AWG 8 to AWG 2 (Copper or Aluminum)
  • Protection: Thermal Magnetic
  • Functions: Long Time and Instantaneous Trip
  • Dimensions: 3.1 in (79 mm) H x 2.2 in (57 mm) W x 2.9 in (74 mm) D
  • Weight: 0.84 lb
  • Temp Rating: -25°C to 70°C (-13°F to 158°F)
  • Standards: CSA, UL Listed
  • Certification: UL Listed
  • Panel Type: Square D NQOD Panelboards
  • Breaker Type: Standard
  • Family: QOB Series
  • Country of Origin: Mexico


Product Identification
  • UPC: 785901368342
  • GTIN: 00785901368342