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Square D QO340VH - 3-Pole Circuit Breaker 40A 240V (22kA AIC)

Square D
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Square D QO340VH is a three-pole 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 240V AC voltage rating, housed within a compact 100A frame with dimensions of 79 mm H x 57 mm W x 74 mm D and a weight of 1.04 lb. The breaker utilizes a thermal-magnetic trip mechanism for both long-time and instantaneous protection and is constructed for plug-in connection with lug terminals, accepting copper or aluminum wire from AWG 8 to AWG 2. It complies with CSA and UL standards and is typically applied in QO load centers and NQ panelboards for commercial and light industrial applications.

Key Features & Specifications
  • Type: Three-pole, molded case, thermal-magnetic circuit breaker with plug-in connection and lug terminals
  • Voltage Rating: 240V AC
  • Current Rating: 40A
  • Dimensions: 79 mm H x 57 mm W x 74 mm D (3.1 in x 2.2 in x 2.9 in)
  • Standards: CSA, UL Listed
  • Applications: Commercial and light industrial power distribution in QO load centers and NQ panelboards
  • Switch Type: Circuit Breaker
  • Configuration: Three-pole
  • Temp Rating: -25 to 70 °C (-13 to 158 °F)
  • Phase: 3
  • AIC Rating: 22kA at 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
  • Wire Size: AWG 8 to AWG 2, Copper or Aluminum
  • Certification: UL Listed
  • Terminal Connection: Lug
  • MCM Size: Minimum Wire Size 4 AWG, Maximum Wire Size 2 AWG
  • Weight: 1.04 lb


Product Identification
  • UPC: 785901060208
  • GTIN: 00785901060208