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Square D QOU245 - Molded Case Circuit Breaker 45A 2-Pole

Square D
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Square D QOU245 is a molded case circuit breaker designed for providing reliable overcurrent protection in single-phase electrical systems. It features a 45A current rating and a 120/240V voltage rating, housed within a compact 100A/QOU frame measuring 102.87 mm H x 38.1 mm W x 74.93 mm D and weighing 0.75 lb. The breaker is CSA, IEC, and UL listed, ensuring compliance with key industry standards for safety and performance. Its thermal-magnetic protection with long-time and instantaneous (LI) trip functions makes it suitable for panel applications in air conditioning, refrigeration, and heating equipment.

Key Features & Specifications
  • Type: Standard molded case circuit breaker with thermal-magnetic protection and LI (Long-time and Instantaneous) trip functions
  • Voltage Rating: 120/240V AC
  • Current Rating: 45A
  • Dimensions: 4.05 in (102.87 mm) H x 1.5 in (38.1 mm) W x 2.95 in (74.93 mm) D
  • Standards: CSA, IEC, UL listed
  • Applications: Air conditioning and refrigeration equipment, heating panels
  • Switch Type: Circuit Breaker
  • Configuration: Bolt-On
  • Temp Rating: -13 to 158 °F (-25 to 70 °C)
  • Shipping Dimensions: 4.05 in (102.87 mm) H x 1.5 in (38.1 mm) W x 2.95 in (74.93 mm) D
  • Phase: 1
  • Voltage: 120/240V
  • Amperage: 45A
  • AIC Rating: 10kA @ 240V
  • Connection: Bolt-On
  • Poles: 2
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous Trip
  • Frame Size: 100A/QOU
  • Trip Type: Thermal Magnetic
  • Panel Type: Air Conditioning and Refrigeration Equipment, Heating
  • Breaker Type: Standard
  • MCM Size: Min. Wire Size 14 AWG, Max. Wire Size 2 AWG
  • Terminal Connection: Slotted Box Lug (Reversible Line and Load)
  • Wire Size: AWG 14 to AWG 2 aluminium/copper
  • Certification: IEC, UL listed


Product Identification
  • UPC: 785901489160
  • GTIN: 00785901489160