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Square D QO220.OB - Circuit Breaker 20A 2-Pole 120/240V

United Fuses
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Square D QO220.OB is a 2-pole circuit breaker designed to provide overcurrent protection for electrical systems. It is rated for 20 Amps at 120/240V AC with a 10kA interrupting capacity, utilizing a thermal magnetic trip unit. The breaker features a plug-in mounting type and accommodates wire sizes from AWG 14 to AWG 8 for copper or aluminum conductors, with dimensions of 3.0 inches in height, 1.5 inches in width, and 2.9 inches in depth. It is UL Listed and CSA Certified for safety and compliance. This breaker is suitable for residential and light commercial electrical panels, offering reliable protection in a compact plug-in form factor.

Key Features & Specifications
  • Type: Circuit Breaker
  • Amperage: 20A
  • Voltage Rating: 120/240V AC
  • Number of Poles: 2
  • Interrupting Capacity: 10kA at 120/240V AC
  • Mounting Type: Plug-In
  • Trip Unit: Thermal Magnetic
  • Series/Frame: QO
  • Wire Size Compatibility: AWG 14–8 (Copper or Aluminum)
  • Certifications: UL Listed, CSA Certified
  • Dimensions: 3.0" H x 1.5" W x 2.9" D
  • Operating Temperature: Up to 40°C (104°F)
  • Weight: 5.19 lb