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Square D QOB290 - Molded Case Circuit Breaker 90A 2-Pole

Square D
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Square D QOB290 is a molded case circuit breaker designed for providing reliable overcurrent protection in commercial and industrial electrical systems. It features a 90A current rating and a voltage rating of 120/240VAC for single-phase applications, with a compact bolt-on design measuring 89 mm H x 38 mm W x 74 mm D and a weight of 0.72 lb. Constructed with thermal-magnetic protection for both long-time and instantaneous trip functions (LI), it offers a 10kA interrupting capacity at 120V and operates within a temperature range of -25°C to 70°C. This UL Listed and CSA-compliant breaker is engineered for use in Square D NQOD panelboards, utilizing pressure plate terminals suitable for copper or aluminum wire from AWG 4 to 2/0.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Standard, Thermal-Magnetic Protection
  • Voltage Rating: 120/240V AC
  • Current Rating: 90 Amps
  • Frame Size: 100A/QO
  • Poles: 2
  • AIC Rating: 10kA @ 120V
  • Connection: Bolt-On
  • Terminal Connection: Pressure Plate
  • Phase: 1
  • Wire Size: AWG 4 to AWG 2/0 (Copper or Aluminum)
  • Dimensions: 3.5 in H (89 mm) x 1.5 in W (38 mm) x 2.9 in D (74 mm)
  • Weight: 0.72 lb
  • Temp Rating: -25°C to 70°C (-13°F to 158°F)
  • Standards: UL Listed, CSA
  • Panel Type: Square D NQOD Panelboards
  • Functions: LI (Long-Time and Instantaneous Trip)
  • Breaker Type: Standard
  • Family: QOB Series


Product Identification
  • UPC: 785901019695
  • GTIN: 00785901019695