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Square D QOU345 - 3-Pole 45A Circuit Breaker (10kA AIC, 240V)

Square D
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The Square D QOU345 is a three-pole molded case circuit breaker designed to provide reliable thermal-magnetic protection for three-phase electrical circuits in industrial and commercial applications. It features a 45A current rating and a 240V AC voltage rating, housed within a compact 100A frame with dimensions of 102.87 mm H x 57.15 mm W x 74.93 mm D and a weight of 1.1 lb. This bolt-on breaker is constructed for durability with a slotted box lug terminal connection for #14 to #2 AWG copper/aluminum wire and offers a 10kA interrupting capacity at 240V AC. It complies with key industry standards including UL and CSA, and is typically applied in panelboards for air conditioning, refrigeration, and heating equipment, operating effectively in ambient temperatures from -25°C to 70°C.

Key Features & Specifications
  • Type: Three-pole, thermal-magnetic, molded case circuit breaker with long-time and instantaneous trip functions
  • Voltage Rating: 240V AC
  • Current Rating: 45A
  • Frame Size: 100A/QOU
  • AIC Rating: 10kA @ 240V AC
  • Poles: 3
  • Connection: Bolt-On
  • Terminal Connection: Slotted Box Lug (Reversible Line and Load)
  • Wire Size: #14 to #2 AWG (Aluminium/Copper)
  • Dimensions: 102.87 mm H x 57.15 mm W x 74.93 mm D (4.05 in x 2.25 in x 2.95 in)
  • Weight: 1.1 lb
  • Operating Temperature: -25°C to 70°C (-13°F to 158°F)
  • Standards & Certification: UL Listed, CSA, IEC
  • Phase: 3
  • Protection: Thermal Magnetic


Product Identification
  • UPC: 785901489191
  • GTIN: 00785901489191