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Square D QO390VH - 90A 3-Pole Molded Case 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 to provide overcurrent protection for electrical systems through its thermal-magnetic trip mechanism. It is rated for 240V AC with a high interrupting capacity of 22kA at 240V, and it operates on a 3-phase system with a current rating of 90A. The breaker measures 3.5 in (89 mm) in height, 2.2 in (57 mm) in width, and 2.9 in (74 mm) in depth, weighing 1.09 lb, and features a plug-in connection with lug terminals accepting wire sizes from AWG 4 to AWG 2/0 copper or aluminum. It is UL Listed and CSA certified, compliant with industry standards, and suitable for use in QO Load Centers and NQ Panelboards. This breaker is typically applied in commercial and industrial settings requiring reliable circuit protection with long time and instantaneous trip functions.

Key Features & Specifications
  • Type: QO Series Molded Case Circuit Breaker
  • Voltage Rating: 240V AC
  • Current Rating: 90A
  • Dimensions: 3.5 in (89 mm) x 2.2 in (57 mm) x 2.9 in (74 mm) (Height x Width x Depth)
  • Standards: UL Listed, CSA Certified
  • Applications: Commercial and industrial electrical systems
  • Switch Type: Thermal Magnetic
  • Configuration: 3-Pole
  • Coil Voltage Maximum: Not applicable
  • Temp Rating: -13 to 158 °F (-25 to 70 °C)
  • Shipping Dimensions: Not specified
  • Phase: 3
  • Voltage: 240V
  • Amperage: 90A
  • AIC rating: 22kA@240V
  • Connection: Plug-In
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: Long Time and Instantaneous Trip
  • Frame Size: 100A/QO
  • Trip Type: Thermal Magnetic
  • Panel Type: QO Load Centers and NQ Panelboards
  • Breaker Type: High Interrupting Capacity
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Min. Wire Size 4 AWG, Max. Wire Size 2 AWG
  • Metal Type: Not specified
  • Panel Style: Not specified
  • Bus Type: Not specified
  • Fuse Class: Not applicable
  • Insulation Temperature: Not specified
  • Inductance: Not applicable
  • Impedance: Not applicable
  • Barrels: Not applicable
  • Class Rating: Not applicable
  • Diameter: Not applicable
  • Velocity: Not applicable
  • Clip Center: Not applicable
  • Clas: Not applicable
  • Mounting: Plug-In
  • Hz: 60 Hz (typical for 240V systems)
  • Coil Material: Not applicable
  • Horse Power: Not specified
  • Aux Contacts: Not specified
  • CPT: Not specified
  • Full Load Amps: 90A
  • Dist Voltage: Not specified
  • Bucket Size: Not applicable
  • Bucket Style: Not applicable
  • Bucket Type: Not applicable
  • Full Load Amp Maximum: 90A
  • Full Load Amp Minimum: Not applicable
  • Enclosure: Not specified
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: AWG 4 to AWG 2/0 Copper/Aluminum
  • Amperage Maximum: 90A
  • Amperage Minimum: Not applicable
  • Nema Rating: Not specified
  • Switch Style: Not applicable
  • Wire Size: AWG 4 to AWG 2/0
  • Certification: UL Listed
  • Circuit Breaker Mounting Style: Plug-In
  • Terminal Connection: Lug
  • Frequency Rating: 60 Hz
  • Phase Connection: 3-Phase
  • Standards: CSA, UL Listed
  • Compatible Frames: QO Series
  • Installation Type: Plug-In
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: 100A/QO
  • Current Rating: 90A
  • Reverse Standoff Voltage: Not applicable
  • Watts: Not applicable
  • Peak Pulse Current: Not applicable
  • Breakdown Voltage (MIN VBR@IT ) (V): Not applicable
  • Breakdown Voltage (VBR@IT) (V): Not applicable
  • Polarity: Not applicable
  • Operating Temperature Maximum Celsius: 70 °C
  • Max Clamp Voltage: Not applicable
  • On-State Current: Not applicable


Product Identification
  • UPC: 785901120612
  • GTIN: 00785901120612