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Square D QO120DFC - Dual-Function Breaker 20A 120V

Square D
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Square D QO120DFC is a dual-function circuit breaker designed for branch circuit protection against arc faults and ground faults in residential and light commercial applications. This 120-volt, 20-amp single-pole breaker provides Class A ground fault protection and combination arc fault protection. The compact unit measures 4.8 inches in height, 0.7 inches in width, and 2.9 inches in depth, weighing 0.594 pounds, and features a plug-on mounting style for QO load centers. It is UL-listed and compliant with NEC requirements for arc fault and ground fault protection. Typical applications include protecting bedroom, living room, and other general-purpose circuits in residential and light commercial electrical panels.

Key Features & Specifications
  • Type: Dual-function (Arc Fault + Ground Fault) circuit breaker
  • Voltage Rating: 120 V AC
  • Current Rating: 20 A
  • Dimensions: 4.8 in (121 mm) H x 0.7 in (19 mm) W x 2.9 in (74 mm) D
  • Standards: UL 489, UL 943, NEC 2017
  • Applications: Residential and light commercial branch circuit protection
  • Switch Type: Toggle
  • Configuration: Single-pole
  • Coil Voltage Maximum: 120 V AC
  • Temp Rating: 40°C
  • Shipping Dimensions: 4.8 in x 0.7 in x 2.9 in
  • Phase: Single-phase
  • Voltage: 120 V
  • Amperage: 20 A
  • AIC rating: 10 kA
  • Connection: Plug-on
  • Poles: 1
  • Protection: Arc fault and ground fault
  • Functions: Dual-function
  • Frame Size: QO
  • Trip Type: Thermal-magnetic
  • Panel Type: QO load centers
  • Breaker Type: Dual-function
  • Control Voltage Minimum: 120 V
  • Control Voltage Maximum: 120 V
  • MCM Size: Not applicable
  • Metal Type: Not applicable
  • Panel Style: QO
  • Bus Type: Plug-on
  • Fuse Class: Not applicable
  • Insulation Temperature: 40°C
  • Inductance: Not specified
  • Impedance: Not specified
  • Barrels: Not applicable
  • Class Rating: Not applicable
  • Diameter: Not applicable
  • Velocity: Not applicable
  • Clip Center: Not applicable
  • Clas: Not applicable
  • Mounting: Plug-on
  • Hz: 60 Hz
  • Coil Material: Not applicable
  • Horse Power: Not applicable
  • Aux Contacts: Not applicable
  • CPT: Not applicable
  • Full Load Amps: Not applicable
  • Dist Voltage: Not applicable
  • Bucket Size: Not applicable
  • Bucket Style: Not applicable
  • Bucket Type: Not applicable
  • Full Load Amp Maximum: Not applicable
  • Full Load Amp Minimum: Not applicable
  • Enclosure: Not applicable
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Not applicable
  • Amperage Maximum: 20 A
  • Amperage Minimum: Not applicable
  • Nema Rating: Not applicable
  • Switch Style: Toggle
  • Wire Size: 14 AWG to 8 AWG
  • Certification: UL listed
  • Circuit Breaker Mounting Style: Plug-on
  • Terminal Connection: Plug-on
  • Frequency Rating: 60 Hz
  • Phase Connection: Single-phase
  • Standards: UL 489, UL 943
  • Compatible Frames: QO
  • Installation Type: Plug-on
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: QO
  • Current Rating: 20 A
  • 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: 78590140168
  • GTIN: 00785901401681