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Square D QOB320 - 3-Pole Circuit Breaker 20A 120/240VAC

Square D
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Square D QOB320 is a three-pole molded case circuit breaker designed to provide reliable overcurrent protection for three-phase electrical systems. It features a 20A current rating and a 120/240VAC voltage rating, with a compact bolt-on design measuring 3.0 in (76 mm) H x 2.2 in (57 mm) W x 2.9 in (74 mm) D and a weight of 0.8 lb. The breaker is constructed with thermal-magnetic protection for both long-time and instantaneous trip functions, is CSA and UL Listed, and operates within a temperature range of -25°C to 70°C (-13°F to 158°F). It is typically applied in Square D NQOD panelboards for commercial and light industrial applications, supporting wire sizes from AWG 14 to AWG 8 with a 10kA interrupting rating at 240V.

Key Features & Specifications
  • Type: Three-pole, molded case, thermal-magnetic circuit breaker with bolt-on connection
  • Voltage Rating: 120/240VAC
  • Current Rating: 20A
  • Frame Size: 100A/QO
  • AIC Rating: 10kA @ 240V
  • Poles: 3
  • Phase: 3
  • Connection: Bolt-On
  • Terminal Connection: Pressure Plate
  • Wire Size: AWG 14 to AWG 8, Copper or Aluminum
  • Protection: Thermal Magnetic
  • Functions: Long Time and Instantaneous Trip
  • Dimensions: 3.0 in (76 mm) H x 2.2 in (57 mm) W x 2.9 in (74 mm) D
  • Weight: 0.8 lb
  • Temp Rating: -25°C to 70°C (-13°F to 158°F)
  • Standards: CSA, UL Listed
  • Certification: UL Listed
  • Panel Type: Square D NQOD Panelboards
  • Breaker Type: Standard


Product Identification
  • UPC: 785901417095
  • GTIN: 00785901417095