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Square D QOB340VH - 3-Pole Circuit Breaker 40A 120/240VAC

Square D
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Square D QOB340VH is a three-pole molded case circuit breaker designed for providing reliable overcurrent protection in three-phase electrical systems. It features a 40A current rating and a voltage rating of 120/240VAC, with a compact bolt-on design measuring 79 mm H x 57 mm W x 74 mm D and a weight of 1.1 lb. The breaker utilizes a thermal-magnetic trip mechanism for both long-time and instantaneous protection, is UL Listed and CSA certified, and is engineered for a wide operating temperature range from -25°C to 70°C. Its 22kA interrupting capacity at 240V and compatibility with Square D NQOD panelboards make it suitable for commercial and light industrial power distribution applications.

Key Features & Specifications
  • Type: Three-pole, molded case, thermal-magnetic circuit breaker with bolt-on connection and pressure plate terminals
  • Voltage Rating: 120/240VAC
  • Current Rating: 40A
  • Dimensions: 3.1 in (79 mm) H x 2.2 in (57 mm) W x 2.9 in (74 mm) D
  • Standards: UL Listed, CSA
  • Applications: Commercial and light industrial power distribution
  • Switch Type: Circuit Breaker
  • Configuration: Three-pole
  • Temp Rating: -25°C to 70°C (-13°F to 158°F)
  • Phase: 3
  • Amperage: 40A
  • AIC rating: 22kA at 240V
  • Connection: Bolt-On
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: Long Time and Instantaneous Trip
  • Frame Size: 100A/QO
  • Panel Type: Square D NQOD Panelboards
  • Breaker Type: High Interrupting Capacity
  • MCM Size: Min. Wire Size 4 AWG, Max. Wire Size 300 MCM
  • Wire Size: AWG 8 to AWG 2, Copper or Aluminum
  • Certification: UL Listed
  • Terminal Connection: Pressure Plate
  • Standards: CSA, UL Listed


Product Identification
  • UPC: 785901054818
  • GTIN: 00785901054818