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Square D QOB390VH1021 - 90A 3-Pole Molded Case Circuit Breaker (22kA@240V)

Square D
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Square D QOB390VH1021 is a 90A, 3-pole molded case circuit breaker from the QOB Series, designed for overcurrent protection in commercial and industrial power distribution systems. It provides thermal-magnetic protection with long-time and instantaneous trip functions, rated for 120/240VAC with a 22kA interrupting capacity at 240V. The unit features a bolt-on connection, pressure plate terminals accepting AWG 4 to AWG 2/0 copper or aluminum wire, and compact dimensions of 3.5 in (89 mm) height, 3.0 in (76 mm) width, and 2.9 in (74 mm) depth, weighing 1.37 lb. It is UL Listed and CSA certified, with an operating temperature range of -13 to 158°F (-25 to 70°C), and is manufactured in Mexico by Schneider Electric. This breaker is suitable for use in panelboards and load centers requiring reliable branch circuit protection in three-phase applications.

Key Features & Specifications
  • Type: QOB
  • Current Rating: 90A
  • Voltage Rating: 120/240VAC
  • Poles: 3
  • Phase: 3
  • Interrupt Rating: 22kA@240V
  • Protection: Thermal Magnetic
  • Trip Functions: Long-Time and Instantaneous Trip
  • Connection: Bolt-On
  • Terminal Connection: Pressure Plate
  • Wire Size: AWG 4 to AWG 2/0, Copper/Aluminum
  • Dimensions: 3.5 in (89 mm) x 3.0 in (76 mm) x 2.9 in (74 mm) (Height x Width x Depth)
  • Weight: 1.37 lb
  • Standards: CSA, UL Listed
  • Temp Rating: -13 to 158°F (-25 to 70°C)
  • Country of Origin: Mexico


Product Identification
  • UPC: 785901335504
  • GTIN: 00785901335504