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Square D HQO306 - QO Series 30A 3-Pole Circuit Breaker

Square D
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Square D HQO306 is a three-pole circuit breaker designed to provide reliable overcurrent protection for industrial and commercial electrical systems. It features a 30A current rating and a 240V voltage rating, suitable for single or three-phase applications. The unit is constructed with a compact form factor measuring 78.49 mm in depth and 112.78 mm in width, weighing 4.041 lb, and accepts AWG 14 to AWG 10 copper or aluminum conductors. It is UL and CSA certified and operates within a temperature range of -25 to 70 °C (-13 to 158 °F). This breaker is typically applied in panelboards and switchboards for protecting feeder and branch circuits.

Key Features & Specifications
  • Type: QO Series, Three-Pole Thermal-Magnetic Circuit Breaker
  • Voltage Rating: 240V AC
  • Current Rating: 30A
  • Dimensions: 78.49 mm Depth x 112.78 mm Width (3.09 in x 4.44 in)
  • Weight: 4.041 lb
  • Standards: UL, CSA Certified
  • Applications: Industrial and Commercial Panelboards, Feeder and Branch Circuit Protection
  • Poles: 3
  • Phase: 1, 3
  • Connection: AWG 14, AWG 10 Copper or Aluminum
  • Wire Size: AWG 14, AWG 10 Copper or Aluminum
  • Temp Rating: -25–70 °C (-13–158 °F)
  • Country of Origin: United States


Product Identification
  • UPC: 785901649601
  • GTIN: 00785901649601