Siemens MP120GFA GFCI Miniature Circuit Breaker
- 20A
- 1 Pole
- Plug-On
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Siemens MP120GFA - 20A GFCI Miniature Circuit Breaker
New
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Description
Built for residential applications, the Siemens MP120GFA is a 1-pole, 20A ground-fault circuit interrupter. It features an integrated self-test and lockout mechanism that automatically verifies functionality to ensure compliance with UL 943 standards. This plug-on breaker is designed for Murray load centers. It serves as a replacement for legacy installations and is replaced by the Siemens QF120A. Rated at 10kAIC at 120VAC, it provides Class A 5mA protection for wet locations.Specifications
| Brand | Siemens |
|---|---|
| Part Number | MP120GFA |
| Series | MP |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | Plug-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC |
| Frame Type | MP |
|---|---|
| Terminal Type | Lugs |
| For Use With | Murray Load Centers |
| 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 | Self-Test Feature (Integrated) |
| Standards | CSA C22.2, HACR, SWD, UL 489, UL 943 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, SWD Rated, Self-Test |
Product FAQs
6 answersWhat is the Siemens equivalent for the Murray MP120GFA?
Since Siemens phased out the Murray brand, the direct Siemens replacement for the MP120GFA is the QF120A. Both are 1-pole, 20A GFCI breakers with self-test functionality.
What is the difference between the MP120GF and the MP120GFA?
The A suffix in the MP120GFA catalog number indicates that the breaker includes an integrated self-test and lockout feature. This automatically verifies the ground fault circuitry to ensure compliance with updated UL 943 standards. The older MP120GF lacks this automated self-test function.
Can I install the MP120GFA in a Siemens load center?
The MP120GFA is specifically listed for use in Murray load centers. While Siemens manufactures both brands and the physical dimensions match Siemens QP breakers, you must verify that your specific Siemens panel label lists Murray MP type breakers as acceptable to maintain UL compliance.
How is the neutral connection made on the MP120GFA?
This breaker utilizes a pigtail neutral design. The coiled white wire must be terminated at the panel neutral bus bar to power the internal ground fault circuitry, while the load neutral wire terminates directly on the breaker lug.
What level of ground fault protection does the MP120GFA provide?
This breaker provides Class A ground fault protection. It is designed to trip when it detects a ground fault current of 5mA, protecting personnel from electrical shock in wet or damp locations such as kitchens, bathrooms, and outdoor circuits.
Does the MP120GFA provide arc fault (AFCI) protection?
No, the MP120GFA is strictly a ground fault circuit interrupter (GFCI). If your application requires both arc fault and ground fault protection to meet NEC requirements, you will need a dual function breaker such as the Siemens Q120DF.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 4 reviews.
- JVJulie V.Verified BuyerReviewingSiemens / Murray MP2100 - 100A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars3/5/26on breaker
so far so good on the refurbished breaker
- JFJon F.ReviewingSiemens / Murray MP250 - 50A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars12/17/20Sales
Fantastic group to work with...
- DSDavid S.ReviewingSiemens / Murray MP2100 - 100A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars1/5/20Thank you so much for
Thank you so much for sending me a 100 amp breaker that was in the condition that you said it would be in.With out your breaker I would still be in the dark Thank you David
- RARichard A.ReviewingSiemens / Murray MP2100 - 100A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/13/19Awesome!
Your prices and number of available items to choose from is Awesome!