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Square D QO340GFI - 3-Pole GFCI Breaker 40A 120/240V

Square D
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Square D QO340GFI is a three-pole molded case circuit breaker designed to provide ground fault protection for 40A circuits in three-phase electrical systems. It operates at a voltage rating of 120/240V AC and features a thermal-magnetic trip mechanism with long-time and instantaneous (LI) functions for reliable overload and short-circuit protection. The breaker is constructed with a compact plug-in design, measuring 105 mm H x 57 mm W x 74 mm D and weighing 1.41 lb, and utilizes lug terminals compatible with wire sizes from 12 AWG aluminum (min) to 4 AWG aluminum (max). It complies with CSA and UL standards and is certified for use in QO load centers and NQ panelboards. This Class A Ground Fault Circuit Interrupter (GFCI) is typically applied in industrial and commercial settings to protect equipment and personnel by interrupting the circuit upon detecting a ground fault current as low as 5mA, with an interrupting capacity of 10kA at 240V.

Key Features & Specifications
  • Type: Three-pole, plug-in, molded case Ground Fault Circuit Interrupter (Class A, 5mA) with thermal-magnetic protection
  • Voltage Rating: 120/240V AC
  • Current Rating: 40A
  • Frame Size: 100A/QO
  • Poles: 3
  • Phase: 3
  • AIC Rating: 10kA @ 240V
  • Protection: Thermal Magnetic
  • Functions: LI (Long-Time and Instantaneous)
  • Connection: Plug-In
  • Terminal Connection: Lug
  • Panel Type: QO Load Centers and NQ Panelboards
  • Standards & Certification: CSA, UL Listed
  • Dimensions: 4.1 in (105 mm) H x 2.2 in (57 mm) W x 2.9 in (74 mm) D
  • Weight: 1.41 lb
  • MCM Wire Size: Minimum 12 AWG (Al) / 14 AWG (Cu); Maximum 4 AWG (Al) / 6 AWG (Cu)
  • Country of Origin: Mexico


Product Identification
  • UPC: 785901979043
  • GTIN: 00785901979043