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Square D QOB390VH - 3-Pole 90A Circuit Breaker (22kA AIC)

Square D
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Square D QOB390VH is a three-pole molded case circuit breaker designed to provide reliable overcurrent protection for three-phase electrical systems. It features a 90A current rating and a 120/240VAC voltage rating, with a compact bolt-on design measuring 89 mm H x 57 mm W x 74 mm D and a weight of 1.07 lb. The breaker utilizes a thermal-magnetic trip mechanism for long-time and instantaneous (LI) protection, is UL Listed and CSA certified, and is engineered for a high interrupting capacity of 22kA at 240V. It is typically applied in industrial and commercial settings within Square D NQOD panelboards, accommodating wire sizes from 4 AWG to 300 MCM via its pressure plate terminals and operating within a temperature range of 40°C (104°F).

Key Features & Specifications
  • Type: Three-pole, bolt-on, molded case circuit breaker with thermal-magnetic protection
  • Voltage Rating: 120/240V AC
  • Current Rating: 90 Amperes
  • Dimensions: 89 mm H x 57 mm W x 74 mm D (3.5 in x 2.2 in x 2.9 in)
  • Standards: UL Listed, CSA Certified
  • Applications: Three-phase power distribution in Square D NQOD panelboards for industrial/commercial use
  • Switch Type: Circuit Breaker
  • Configuration: Bolt-On
  • Temp Rating: 40°C (104°F) operating temperature
  • Phase: 3
  • AIC Rating: 22kA at 240V
  • Connection: Bolt-On
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: Long-Time and Instantaneous (LI)
  • Frame Size: 100A/QO
  • Trip Type: Thermal-Magnetic
  • Panel Type: Square D NQOD Panelboards
  • Breaker Type: High Interrupting Capacity
  • MCM Size: Minimum 4 AWG, Maximum 300 MCM
  • Wire Size: 4 to 2/0 AWG Aluminum/Copper
  • Certification: UL Listed
  • Terminal Connection: Pressure Plate
  • Standards: CSA, UL Listed
  • Weight: 1.07 lb


Product Identification
  • UPC: 785901054863
  • GTIN: 00785901054863