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Square D QOM2125MM - Main Breaker 125A 2-Pole (10kA AIC)

Square D
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Square D QOM2125MM is a molded case circuit breaker designed as a main breaker for providing overcurrent and short-circuit protection in single-phase electrical systems. It features a 125A current rating and a 240V AC voltage rating, housed within a compact, bolt-on unit measuring 142 mm H x 129 mm W x 91 mm D (5.6 in x 5.08 in x 3.6 in) and weighing 2.69 lb. The breaker utilizes a thermal-magnetic trip mechanism for both long-time and instantaneous (LI) protection, is UL Listed and CSA certified, and is engineered for reliable operation in temperatures from -25°C to 70°C (-13°F to 158°F). Its 10kA interrupting rating at 240V and lug terminals compatible with wire sizes from 4 AWG to 300 kcmil (copper or aluminum) make it suitable for residential and light commercial QO load centers.

Key Features & Specifications
  • Type: Molded Case, Main Breaker, Thermal Magnetic Protection with Long-Time and Instantaneous (LI) Trip
  • Voltage Rating: 240V AC
  • Current Rating: 125A
  • Dimensions: 142 mm H x 129 mm W x 91 mm D (5.6 in x 5.08 in x 3.6 in)
  • Standards: UL Listed, CSA
  • Applications: Main circuit protection for single-phase QO load centers in residential and light commercial settings
  • Switch Type: Circuit Breaker
  • Configuration: Bolt-on
  • Temp Rating: -25°C to 70°C (-13°F to 158°F)
  • Phase: 1
  • Amperage: 125A
  • AIC rating: 10kA @ 240V
  • Connection: Bolt-on, Lug Terminal
  • Poles: 2
  • Protection: Thermal Magnetic
  • Functions: LI (Long-Time and Instantaneous Trip)
  • Breaker Type: Main Breaker
  • MCM Size: Min. 4 AWG, Max. 300 kcmil (Copper or Aluminum)
  • Wire Size: 4 AWG to 300 kcmil
  • Certification: UL Listed, CSA
  • Panel Type: QO Load Center
  • Family: QOM Series
  • Weight: 2.69 lb


Product Identification
  • UPC: 785901324270
  • GTIN: 00785901324270