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Square D QO390VH - Molded Case 90A 3-Pole Breaker (240V)

Square D
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Square D QO390VH is a 3-pole, 90A molded case circuit breaker from the QO Series, designed for overcurrent protection in commercial and industrial electrical systems. It operates at 240V with a high interrupting capacity of 22kA@240V and provides thermal magnetic protection through long time and instantaneous trip functions. The unit measures 3.5 in (89 mm) x 2.2 in (57 mm) x 2.9 in (74 mm), weighs 1.09 lb, and features a plug-in connection with lug terminals for AWG 4 to AWG 2/0 copper/aluminum wiring. It is UL Listed and CSA certified, suitable for use in QO Load Centers and NQ Panelboards, and operates within a temperature range of -13–158 °F (-25–70 °C).

Key Features & Specifications
  • Type: QO
  • Poles: 3
  • Current Rating: 90A
  • Voltage Rating: 240V
  • Frame Size: 100A/QO
  • Breaker Type: High Interrupting Capacity
  • AIC rating: 22kA@240V
  • Protection: Thermal Magnetic
  • Functions: Long Time and Instantaneous Trip
  • Connection: Plug-In
  • Terminal Connection: Lug
  • Wire Size: AWG 4 to AWG 2/0 Copper/Aluminum
  • Min. Wire Size: 4 AWG
  • Max. Wire Size: 2 AWG
  • Panel Type: QO Load Centers and NQ Panelboards
  • Phase: 3
  • Temp Rating: -13–158 °F (-25–70 °C)
  • Dimensions: 3.5 in (89 mm) x 2.2 in (57 mm) x 2.9 in (74 mm) (Height x Width x Depth)
  • Weight: 1.09 lb
  • Standards: CSA, UL Listed
  • Certification: UL Listed
  • Country of Origin: Mexico
  • Family: QO Series
  • Item Subcategory: Molded Case


Product Identification
  • UPC: 785901120612
  • GTIN: 00785901120612