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Siemens QF120 GFCI Miniature Circuit Breaker
- 20A
- 1 Pole
- Plug-On
Siemens
QF120
GFCI Miniature Circuit Breaker
Brand
Siemens
SKU
QF120
Quantity
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Siemens QF120 - 20A GFCI Miniature Circuit Breaker
New
Quantity
Quantity
Siemens QF120 - 20A GFCI Miniature Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | QF120 |
| Series | QF |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | Plug-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Load Centers (EQ, ES, PL, Ultimate) |
| Wire Gauge | 14-10 AWG (Cu), 12-8 AWG (Al) |
| Max Wire | 10 AWG (Cu), 8 AWG (Al) |
| Min Wire | 14 AWG (Cu), 12 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LIG |
| Trip Function | Long-Time, Instantaneous, Ground Fault |
| Trip Adjustability | Fixed |
| Special Classification | GFCI |
|---|---|
| Available Options | Padlock Attachment |
| Accessories | Pigtail Neutral (Factory Installed) |
| Standards | CSA C22.2 No. 144, UL 489, UL 943 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, SWD Rated, Insta-Wire |
Sold out
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Siemens QF120 - 20A GFCI Miniature Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | QF120-R |
| Series | QF |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | Plug-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Load Centers (EQ, ES, PL, Ultimate) |
| Wire Gauge | 14-10 AWG (Cu), 12-8 AWG (Al) |
| Max Wire | 10 AWG (Cu), 8 AWG (Al) |
| Min Wire | 14 AWG (Cu), 12 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LIG |
| Trip Function | Long-Time, Instantaneous, Ground Fault |
| Trip Adjustability | Fixed |
| Special Classification | GFCI |
|---|---|
| Available Options | Padlock Attachment |
| Accessories | Pigtail Neutral (Factory Installed) |
| Standards | CSA C22.2 No. 144, UL 489, UL 943 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, SWD Rated, Insta-Wire |
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Description
Mounts into Siemens EQ, ES, and PL series panelboards to deliver code-compliant safety for kitchens, bathrooms, and outdoor receptacles. The QF120 is a 20-amp, single-pole GFCI breaker that provides 5mA Class A ground fault protection alongside standard thermal-magnetic overload defense. Rated for 10kAIC at 120VAC, it utilizes a factory-installed pigtail neutral and Insta-Wire technology to accelerate the wiring process. This unit serves as a reliable replacement for the MP120GF.Specifications
| Brand | Siemens |
|---|---|
| Part Number | QF120 |
| Series | QF |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | Plug-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Load Centers (EQ, ES, PL, Ultimate) |
| Wire Gauge | 14-10 AWG (Cu), 12-8 AWG (Al) |
| Max Wire | 10 AWG (Cu), 8 AWG (Al) |
| Min Wire | 14 AWG (Cu), 12 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LIG |
| Trip Function | Long-Time, Instantaneous, Ground Fault |
| Trip Adjustability | Fixed |
| Special Classification | GFCI |
|---|---|
| Available Options | Padlock Attachment |
| Accessories | Pigtail Neutral (Factory Installed) |
| Standards | CSA C22.2 No. 144, UL 489, UL 943 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, SWD Rated, Insta-Wire |
Product FAQs
6 answersCan the Siemens QF120 replace a Murray MP120GF circuit breaker?
Yes. Siemens has discontinued the Murray brand, and the Siemens QF120 is the official, UL-listed replacement for the obsolete Murray MP120GF 20A GFCI breaker.
What level of ground fault protection does the QF120 provide?
The QF120 is a Class A Ground Fault Circuit Interrupter (GFCI). It features a 5mA trip sensitivity threshold to protect personnel from electrical shock in residential and commercial applications.
How is the neutral wire connected on the QF120 breaker?
This breaker features a factory-installed pigtail neutral wire. The pigtail must be connected directly to the neutral bus bar in the load center to ensure proper ground fault detection.
Which load centers are compatible with the QF120 GFCI breaker?
The QF120 is designed for use in Siemens EQ, ES, PL, and Ultimate series load centers that accept Type QP or QPF plug-on circuit breakers.
Does the Siemens QF120 provide Arc Fault (AFCI) protection?
No, the QF120 provides only Ground Fault (GFCI) and standard thermal-magnetic overcurrent protection. For dual-function AFCI and GFCI protection in a single breaker, a dual-function breaker like the Q120DF is required.
Can the QF120 be used on a shared neutral or multi-wire branch circuit?
No. As a 1-pole 120V GFCI breaker, the QF120 cannot be used on multi-wire branch circuits with shared neutrals. A 2-pole GFCI breaker is required for those applications to ensure proper ground fault detection and prevent nuisance tripping.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 22 reviews.
Total 5 star reviews: 21 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 1 Total 1 star reviews: 0
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Rating
22 reviews
- TSTHOMAS S.Verified BuyerReviewingSiemens QF220 - 20A GFCI Miniature Circuit BreakerI do not recommend this productRated 2 out of 5 stars3/30/26Double check correct version
I received the Q220”A” version. Superbreaker was easy to work with for a return.
- KHKarmen H.ReviewingSiemens QF120A - 20A GFCI Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars7/31/23Very happy
I am a small contractor in MN and when I get to the hard to find or not readily available in out are I always turn to SuperBreakers, for great selection and quick shipping.
- KHKarmen H.ReviewingSiemens QF115A - 15A GFCI Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars7/31/23Breaker
I am a small contractor in MN and when I get to the hard to find or not readily available in out are I always turn to SuperBreakers, for great selection and quick shipping.
- JHJeff H.ReviewingSiemens QF120AN - 20A GFCI Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars1/26/23all good
all good
- DBDean B.ReviewingSiemens QF130 - 30A GFCI Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/25/22Master Electrician
Lets me keep this short and simple.. Order from Super Breakers and you won’t be disappointed!!
Thank you for your business Super Breakers!