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Square D QOB340GFI - 3-Pole GFCI Breaker 40A 120/240VAC

Square D
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Square D QOB340GFI is a three-pole molded case circuit breaker designed to provide ground fault and overcurrent protection for three-phase electrical systems. It operates at a 40A current rating with a voltage rating of 120/240VAC and features a 10kA interrupting capacity at 240V, utilizing a thermal magnetic trip mechanism for long-time and instantaneous protection. The breaker is constructed with a compact bolt-on connection, pressure plate terminals, and measures 105 mm H x 57 mm W x 74 mm D (4.1 in x 2.2 in x 2.9 in), weighing 1.41 lb. It is compliant with CSA and UL standards and is engineered for installation in QO load centers and NQ panelboards, making it suitable for commercial and light industrial applications requiring Class A ground fault protection with a 5mA trip threshold.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Ground Fault Circuit Interrupter (Class A - 5mA), Thermal Magnetic Protection
  • Voltage Rating: 120/240VAC
  • Current Rating: 40A
  • Dimensions: 105 mm H x 57 mm W x 74 mm D (4.1 in x 2.2 in x 2.9 in)
  • Standards: CSA, UL Listed
  • Applications: Commercial and light industrial three-phase systems
  • Switch Type: Circuit Breaker
  • Configuration: Bolt-On
  • Phase: 3
  • AIC Rating: 10kA@240V
  • Connection: Bolt-On
  • Poles: 3
  • Protection: Thermal Magnetic, Ground Fault
  • Functions: LI - Long-Time and Instantaneous
  • Frame Size: 100A/QO
  • Trip Type: Thermal Magnetic
  • Panel Type: QO Load Centers and NQ Panelboards
  • Breaker Type: Ground Fault Circuit Interrupter (GFCI)
  • Temp Rating: -40°C to 40°C (-40°F to 104°F)
  • MCM Size: Min. Wire Size 12 AWG (Al), 14 AWG (Cu); Max. Wire Size 4 AWG (Al), 6 AWG (Cu)
  • Terminal Connection: Pressure Plate
  • Wire Size: AWG 12, AWG 4 aluminium, AWG 14, AWG 6 copper
  • Certification: UL Listed
  • Family: QOB Series
  • Country of Origin: Mexico
  • Weight: 1.41 lb


Product Identification
  • UPC: 785901167280
  • GTIN: 00785901167280