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Square D QOB340VH1021 - 40A 3-Pole Circuit Breaker (22kA AIC)

Square D
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Square D QOB340VH1021 is a molded case circuit breaker designed for providing reliable overcurrent and short-circuit protection in three-phase electrical systems. It features a 40A current rating and a 120/240VAC voltage rating, with a 22kA interrupting capacity at 240V for robust fault protection. The breaker is constructed with a compact bolt-on connection, pressure plate terminals, and a thermal-magnetic trip unit providing both long-time and instantaneous trip functions, housed within dimensions of 79 mm H x 76 mm W x 74 mm D and a weight of 1.33 lb. It is certified to UL and CSA standards and operates within a temperature range of -25°C to 70°C. This breaker is typically applied in industrial and commercial panelboards, compatible with wire sizes from 8 AWG to 2 AWG for copper or aluminum conductors.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal-Magnetic Protection, Standard Type
  • Voltage Rating: 120/240V AC
  • Current Rating: 40A
  • AIC Rating: 22kA @ 240V
  • Poles: 3
  • Phase: 3
  • Connection: Bolt-On
  • Terminal Connection: Pressure Plate
  • Wire Size: 8 AWG to 2 AWG (Copper/Aluminum)
  • Trip Functions: Long-Time and Instantaneous
  • Dimensions: 3.1 in H (79 mm) x 3.0 in W (76 mm) x 2.9 in D (74 mm)
  • Weight: 1.33 lb
  • Temp Rating: -25°C to 70°C (-13°F to 158°F)
  • Standards & Certification: UL Listed, CSA
  • Breaker Type: Standard
  • Family: QOB Series


Product Identification
  • UPC: 785901311317
  • GTIN: 00785901311317