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Square D QOB120K - Thermal Magnetic Circuit Breaker 20A 1-Pole

Square D
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Square D QOB120K is a 1-pole bolt-on thermal magnetic circuit breaker from the QOB Series, designed to provide long-time and instantaneous (LI) protection for branch circuits. It is rated for 20A at 120/240 VAC with a 10kA interrupting capacity at 120V, supporting single-phase applications. The breaker measures 3.0 in (76 mm) high by 0.7 in (19 mm) wide by 2.9 in (74 mm) deep, weighs 0.32 lb, and features a pressure plate terminal connection for wire sizes from 14 AWG to 8 AWG. It is UL Listed and CSA certified, with an ambient temperature rating of 104°F (40°C) and includes a trip flag indicator. This unit is suitable for industrial and commercial panelboards requiring bolt-on mounting and key-operated security.

Key Features & Specifications
  • Type: QOB
  • Amperage: 20A
  • Voltage: 120/240 VAC
  • Number of Poles: 1
  • Phase: 1
  • Mounting Type: Bolt-On
  • Interrupt Rating: 10 kA at 120V
  • Trip Unit: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous
  • Terminal Connection: Pressure Plate
  • Wire Size: 14 AWG to 8 AWG
  • Ambient Rating: 104°F (40°C)
  • Dimensions: 3.0 in (76 mm) x 0.7 in (19 mm) x 2.9 in (74 mm) (Height x Width x Depth)
  • Weight: 0.32 lb
  • Standards: CSA, UL Listed
  • Certification: UL Listed
  • Country of Origin: United States


Product IDs: QOB120K