Siemens QF240A Ground Fault Circuit Interrupter

The Siemens QF240A is a 2-pole, 40-amp plug-in ground fault circuit interrupter (GFCI) breaker for 120/240 V circuits, built on the QPF frame and rated for 10 kA interrupt capacity at 240 V. It employs a thermal-magnetic trip mechanism and plugs into Siemens load centers that support plug-in GFCI protection, specifically within the QPF/GFCI family. This 40 A GFCI is commonly used to protect circuits in wet areas such as bathrooms, kitchens, and spa or hot tub feeders, delivering ground fault protection as required by code. The unit is a 2-pole, 1-phase device with plug-in terminals and measures about 12.7 inches long, 6.8 inches wide, and 7.9 inches high. It is identified by the QF240A model designation for 120/240 V service and is designed for use in Siemens plug-in panels that support GFCI protection.