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Square D QOH2125 - 2-Pole 125A Circuit Breaker (42kA AIC)

Square D
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Square D QOH2125 is a molded case circuit breaker designed for providing reliable overcurrent protection in single-phase 240V AC electrical systems. It features a 125A current rating and a 42kA interrupting capacity at 240V, utilizing a thermal-magnetic trip mechanism for both long-time delay and instantaneous short-circuit protection. The compact plug-in unit measures 3.5 in (89 mm) H x 2.2 in (57 mm) W x 2.9 in (74 mm) D, weighs 0.72 lb, and is constructed with box lug terminals compatible with copper or aluminum conductors from AWG 4 to 2/0. This breaker is UL Listed and CSA certified, ensuring compliance with North American safety standards for use in industrial panels, commercial distribution equipment, and other applications requiring robust circuit protection.

Key Features & Specifications
  • Type: QOH Series, Standard, Molded Case, Thermal Magnetic Protection
  • Voltage Rating: 240V AC
  • Current Rating: 125A
  • Dimensions: 3.5 in (89 mm) H x 2.2 in (57 mm) W x 2.9 in (74 mm) D
  • Standards: UL Listed, CSA
  • Applications: Industrial Panels, Commercial Distribution
  • Switch Type: Circuit Breaker
  • Configuration: Plug-In
  • Temp Rating: -25°C to 70°C (-13°F to 158°F)
  • Shipping Dimensions: As Product Dimensions
  • Phase: 1
  • Voltage: 240V
  • Amperage: 125A
  • AIC rating: 42kA @ 240V
  • Connection: Plug-In
  • Poles: 2
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous Trip
  • Frame Size: QO Series
  • Trip Type: Thermal Magnetic
  • Panel Type: Compatible with QO Load Centers
  • Breaker Type: Standard
  • MCM Size: Min. 4 AWG, Max. 2/0 AWG (Cu/Al)
  • Mounting: Plug-In
  • Hz: 50/60 Hz
  • Wire Size: AWG 4 to AWG 2/0, Copper or Aluminum
  • Certification: UL Listed, CSA
  • Circuit Breaker Mounting Style: Plug-In
  • Terminal Connection: Box Lugs
  • Frequency Rating: 50/60 Hz
  • Phase Connection: Single-Phase
  • Standards: UL 489, CSA C22.2 No. 5
  • Compatible Frames: QO Series Load Centers
  • Installation Type: Plug-In
  • Item QTY: 1
  • Breaker Frame: QO
  • Current Rating: 125A
  • Operating Temperature Maximum Celsius: 70°C


Product Identification
  • UPC: 785901054887
  • GTIN: 00785901054887