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Square D QOM2125MVH - Main Breaker 125A 240V (2-Pole Bolt-On)

Square D
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The Square D QOM2125MVH is a molded case main breaker designed for overcurrent protection in residential and light commercial QO load centers. This 125A, 240V, 1-phase, 2-pole unit provides thermal-magnetic protection with long-time and instantaneous trip functions. The breaker measures 5.6 in (142 mm) x 5.08 in (129 mm) x 3.6 in (91 mm) and weighs 2.67 lb, featuring a bolt-on connection and lug terminals that accept wire sizes from 4 AWG to 300 kcmil (copper/aluminum). It is UL Listed and CSA certified, with an AIC rating of 22kA at 240V and an operating temperature range of -13°F to 158°F (-25°C to 70°C). This breaker is suitable for use as a main disconnect in QO panelboards, ensuring reliable circuit protection in distribution systems.

Key Features & Specifications
  • Type: Molded Case Main Breaker, Thermal Magnetic Protection
  • Voltage Rating: 240V
  • Current Rating: 125A
  • Dimensions: 5.6 in (142 mm) x 5.08 in (129 mm) x 3.6 in (91 mm) (Height x Width x Depth)
  • Standards: UL Listed, CSA
  • Applications: Main disconnect in QO load centers for residential and light commercial
  • Switch Type: Main Breaker
  • Configuration: 2-Pole, 1-Phase
  • Coil Voltage Maximum: Not applicable (thermal magnetic)
  • Temp Rating: -13°F to 158°F (-25°C to 70°C)
  • Shipping Dimensions: Not specified
  • Phase: 1
  • Voltage: 240V
  • Amperage: 125A
  • AIC rating: 22kA@240V
  • Connection: Bolt-On
  • Poles: 2
  • Protection: Thermal Magnetic
  • Functions: Long Time and Instantaneous Trip
  • Frame Size: QOM
  • Trip Type: Thermal Magnetic
  • Panel Type: QO Load Center
  • Breaker Type: Main Breaker
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Min. Wire Size 4 AWG (Cu/Al) Max. Wire Size 300 kcmil (Cu/Al)
  • Metal Type: Not specified
  • Panel Style: QO
  • Bus Type: Not specified
  • Fuse Class: Not applicable
  • Insulation Temperature: Not specified
  • Inductance: Not applicable
  • Impedance: Not specified
  • Barrels: Not applicable
  • Class Rating: Not applicable
  • Diameter: Not applicable
  • Velocity: Not applicable
  • Clip Center: Not applicable
  • Clas: Not applicable
  • Mounting: Bolt-On
  • Hz: 50/60 Hz
  • Coil Material: Not applicable
  • Horse Power: Not specified
  • Aux Contacts: Not applicable
  • CPT: Not applicable
  • Full Load Amps: 125A
  • Dist Voltage: Not specified
  • Bucket Size: Not applicable
  • Bucket Style: Not applicable
  • Bucket Type: Not applicable
  • Full Load Amp Maximum: 125A
  • Full Load Amp Minimum: Not specified
  • Enclosure: Not specified
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Copper/Aluminum
  • Amperage Maximum: 125A
  • Amperage Minimum: Not specified
  • Nema Rating: Not specified
  • Switch Style: Main Breaker
  • Wire Size: AWG 4 to 300KCmil Copper/Aluminum
  • Certification: UL Listed, CSA
  • Circuit Breaker Mounting Style: Bolt-On
  • Terminal Connection: Lug
  • Frequency Rating: 50/60 Hz
  • Phase Connection: 1-Phase
  • Standards: UL Listed, CSA
  • Compatible Frames: QO Load Centers
  • Installation Type: Bolt-On
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: QOM
  • Current Rating: 125A
  • Reverse Standoff Voltage: Not applicable
  • Watts: Not specified
  • Peak Pulse Current: Not applicable
  • Breakdown Voltage (MIN VBR@IT ) (V): Not applicable
  • Breakdown Voltage (VBR@IT) (V): Not applicable
  • Polarity: Not applicable
  • Operating Temperature Maximum Celsius: 70°C
  • Max Clamp Voltage: Not applicable
  • On-State Current: Not applicable


Product Identification
  • UPC: 785901301516
  • GTIN: 00785901301516