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Square D QOB120AF - Molded Case 20A 1-Pole Breaker

Square D
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Square D QOB120AF Circuit Breaker is a 1-pole bolt-on molded case circuit breaker designed for thermal magnetic overcurrent protection in residential and light commercial load centers. It is rated for 20A at 120/240VAC with a 10kA interrupting capacity at 120V, providing LI (Long-Time and Instantaneous) protection functions. The unit features a pressure plate terminal connection, weighs 1 lb, and is constructed for single-phase, 60Hz applications. It is UL Listed and CSA certified, meeting industry standards for safety and performance. This breaker is typically used in Square D QOB series panelboards for branch circuit protection in lighting, appliance, and general-purpose power distribution systems.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, QOB Series, Thermal Magnetic
  • Voltage Rating: 120/240VAC
  • Current Rating: 20A
  • Dimensions: Standard QOB frame size
  • Standards: UL Listed, CSA Certified
  • Applications: Branch circuit protection in residential and light commercial load centers
  • Switch Type: Toggle
  • Configuration: 1-Pole
  • Coil Voltage Maximum: Not applicable (thermal magnetic)
  • Temp Rating: 40°C ambient
  • Shipping Dimensions: Standard QOB packaging
  • Phase: 1
  • Voltage: 120/240VAC
  • Amperage: 20A
  • AIC rating: 10kA@120V
  • Connection: Bolt-On
  • Poles: 1
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous
  • Frame Size: QOB
  • Trip Type: Thermal Magnetic
  • Panel Type: QOB Load Centers
  • Breaker Type: QOB
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Not applicable
  • Metal Type: Not specified
  • Panel Style: Bolt-On
  • Bus Type: Not specified
  • Fuse Class: Not applicable
  • Insulation Temperature: 60/75°C
  • Inductance: Not applicable
  • Impedance: Not applicable
  • Barrels: Not applicable
  • Class Rating: Not applicable
  • Diameter: Not applicable
  • Velocity: Not applicable
  • Clip Center: Not applicable
  • Clas: Not applicable
  • Mounting: Bolt-On
  • Hz: 60
  • Coil Material: Not applicable
  • Horse Power: Not specified
  • Aux Contacts: Not included
  • 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 specified
  • Amperage Maximum: 20A
  • Amperage Minimum: Not applicable
  • Nema Rating: Not specified
  • Switch Style: Toggle
  • Wire Size: #14-8 AWG Cu/Al
  • Certification: UL Listed
  • Circuit Breaker Mounting Style: Bolt-On
  • Terminal Connection: Pressure Plate
  • Frequency Rating: 60Hz
  • Phase Connection: Single Phase
  • Standards: CSA, UL Listed
  • Compatible Frames: QOB
  • Installation Type: Bolt-On
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: QOB
  • Current Rating: 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: 785901959051
  • GTIN: 00785901299356