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Square D QOUMF2 - Miniature Circuit Breaker 15-20A (1-Pole)

Square D
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Square D QOUMF2 Circuit Breaker is a miniature circuit breaker designed for overcurrent and short-circuit protection in residential and light commercial electrical systems. It is rated for 120/240V AC and 15-20A, with a 10kA interrupting capacity at 120V AC. The unit features a compact, plug-on design with a thermal-magnetic trip mechanism and a 1-inch per pole construction. It complies with UL 489 and CSA C22.2 standards for safety and performance. This breaker is typically used in Square D QO load centers for branch circuit protection.

Key Features & Specifications
  • Type: Miniature circuit breaker, thermal-magnetic, plug-on
  • Voltage Rating: 120/240V AC
  • Current Rating: 15-20A
  • Dimensions: 1-inch per pole width, 3.0-inch height, 2.25-inch depth
  • Standards: UL 489, CSA C22.2
  • Applications: Branch circuit protection in QO load centers
  • Switch Type: Toggle
  • Configuration: Single-pole
  • Coil Voltage Maximum: Not applicable
  • Temp Rating: 40°C ambient
  • Shipping Dimensions: 3.5 x 2.5 x 1.5 inches
  • Phase: Single-phase
  • Voltage: 120/240V AC
  • Amperage: 15-20A
  • AIC rating: 10kA at 120V AC
  • Connection: Plug-on
  • Poles: 1
  • Protection: Overcurrent and short-circuit
  • Functions: Thermal-magnetic trip
  • Frame Size: QO
  • Trip Type: Thermal-magnetic
  • Panel Type: QO load center
  • Breaker Type: Miniature
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Not applicable
  • Metal Type: Copper and steel
  • Panel Style: QO
  • Bus Type: Plug-on
  • Fuse Class: Not applicable
  • Insulation Temperature: 105°C
  • Inductance: Not specified
  • Impedance: Not specified
  • Barrels: Not applicable
  • Class Rating: Not applicable
  • Diameter: Not applicable
  • Velocity: Not applicable
  • Clip Center: 1.0 inch
  • Clas: Not applicable
  • Mounting: Plug-on
  • Hz: 50/60 Hz
  • Coil Material: Not applicable
  • Horse Power: 1 HP at 120V AC
  • Aux Contacts: Not included
  • CPT: Not included
  • Full Load Amps: 15-20A
  • Dist Voltage: 120/240V AC
  • Bucket Size: Not applicable
  • Bucket Style: Not applicable
  • Bucket Type: Not applicable
  • Full Load Amp Maximum: 20A
  • Full Load Amp Minimum: 15A
  • Enclosure: Open
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: 14-8 AWG copper/aluminum
  • Amperage Maximum: 20A
  • Amperage Minimum: 15A
  • Nema Rating: Not applicable
  • Switch Style: Toggle
  • Wire Size: 14-8 AWG
  • Certification: UL, CSA
  • Circuit Breaker Mounting Style: Plug-on
  • Terminal Connection: Screw
  • Frequency Rating: 50/60 Hz
  • Phase Connection: Single-phase
  • Standards: UL 489, CSA C22.2
  • Compatible Frames: QO
  • Installation Type: Plug-on
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: QO
  • Current Rating: 15-20A
  • Reverse Standoff Voltage: Not applicable
  • Watts: Not applicable
  • 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: 40°C
  • Max Clamp Voltage: Not applicable
  • On-State Current: Not applicable


Product Identification
  • UPC: 78590109043
  • GTIN: 00785901090434