Overview
The Siemens QF120AN is a 20 A, 120 V AC, single-pole Class A ground-fault circuit interrupter for compatible Siemens plug-on-neutral load centers. Its official QPF2N configuration combines personnel-level GFCI protection with thermal-magnetic overload and short-circuit protection and a 10 kA interrupting rating.
Key Features
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Class A GFCI protection: Provides personnel ground-fault protection with self-test electronics while retaining thermal-magnetic overcurrent protection.
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Plug-on-neutral installation: Connects directly to the neutral rail in a compatible Siemens plug-on-neutral load center and uses a load-side screw/box lug.
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Exact QPF2N family: Use only in Siemens equipment whose labeling accepts the QF120AN/QPF2N configuration.
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20 A branch rating: Rated 20 A, one pole, 120 V AC, with 10 kA interrupting capacity.
Specifications
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Manufacturer / model: Siemens QF120AN
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Official type / family: QPF2N
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Current / voltage: 20 A / 120 V AC
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Poles / phase: 1 pole / single phase
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Protection: Class A GFCI; thermal magnetic
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Interrupting rating: 10 kA
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Mounting / terminals: Plug-in, plug-on-neutral; load-side screw/box lug
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Conductor range: #14–10 AWG copper; #12–8 AWG aluminum
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Reference temperature: 104°F (40°C)
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Standards: UL 489; UL 943; HACR rated
Common Applications
- Compatible Siemens plug-on-neutral load centers requiring the exact QF120AN breaker.
- 120 V, 20 A bathroom, kitchen, garage, laundry, basement, outdoor, and similar branch circuits requiring Class A GFCI protection.
- Like-for-like replacement where the equipment label specifies QF120AN or the QPF2N family.
