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Square D QH320 - Molded Case Circuit Breaker 20A 3P 240V

Square D
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Square D QH320 is a molded case circuit breaker designed for providing reliable overcurrent protection in three-phase electrical systems. It features a 20A current rating and a 240V voltage rating, housed in a compact plug-in unit measuring 76 mm x 57 mm x 74 mm (HxWxD) and weighing 0.86 lb. The breaker utilizes a thermal-magnetic trip mechanism with long-time and instantaneous (LI) functions, offers a high 65kA interrupting capacity at 240V, and operates within a temperature range of -25 to 70 °C. It is engineered for industrial and commercial applications, compatible with copper or aluminum conductors from AWG 14 to AWG 8.

Key Features & Specifications
  • Type: Molded Case, Thermal-Magnetic Protection, Plug-In Connection
  • Voltage Rating: 240V AC
  • Current Rating: 20A
  • Dimensions: 3.0 in (76 mm) x 2.2 in (57 mm) x 2.9 in (74 mm) (H x W x D)
  • Standards: Designed to meet applicable industry standards
  • Applications: Industrial and commercial three-phase power distribution
  • Switch Type: Circuit Breaker
  • Configuration: Three-Pole
  • Temp Rating: -13–158 °F (-25–70 °C)
  • Phase: 3
  • AIC Rating: 65kA @ 240V
  • Connection: Plug-In
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous Trip
  • Wire Size: AWG 14 to AWG 8, Copper/Aluminum
  • Family: QO Series
  • Country of Origin: Mexico


Product Identification
  • UPC: 785901205524
  • GTIN: 00785901205524