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Siemens QF250A GFCI Miniature Circuit Breaker
- 50A
- 2 Pole
- Plug-On
Siemens
QF250A
GFCI Miniature Circuit Breaker
Brand
Siemens
SKU
QF250A
Quantity
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Siemens QF250A - 50A GFCI Miniature Circuit Breaker
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Description
Built for modern safety standards, the Siemens QF250A is a 50A, two-pole GFCI breaker featuring an integrated self-test function. This Class A 5mA device automatically verifies its ground-fault circuitry, ensuring reliable protection for wet locations. Designed as a direct upgrade, this plug-on breaker replaces the legacy QF250 and installs into Siemens EQ, ES, PL, and Ultimate load centers. With a 10 kAIC rating at 120/240V, it provides robust thermal-magnetic overcurrent protection.Specifications
| Brand | Siemens |
|---|---|
| Part Number | QF250A |
| Series | QF |
| Amperage | 50A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens EQ, ES, PL, Ultimate Load Centers |
| Wire Gauge | 8-6 AWG (Cu), 8-4 AWG (Al) |
| Max Wire | 6 AWG (Cu), 4 AWG (Al) |
| Min Wire | 8 AWG |
| 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 No. 144, UL 489, UL 943 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Self-Test |
Product FAQs
5 answersWhat is the difference between the Siemens QF250 and the QF250A?
The QF250A is the direct, modernized replacement for the legacy QF250. The "A" suffix indicates the addition of an integrated self-test feature, which automatically verifies the ground-fault circuitry to comply with updated UL 943 safety standards.
What is the ground-fault trip threshold for the QF250A?
This breaker provides Class A ground-fault protection, meaning it is designed to trip when it detects a current imbalance of 4 to 5 milliamps (mA). This level of protection is required for personnel safety in wet locations like spas, hot tubs, and bathrooms.
Does the QF250A require a neutral connection if my 240V load does not use a neutral wire?
Yes. Even if your 240V load is strictly 2-wire and does not require a load neutral, you must still connect the breaker's white pigtail wire to the panel's neutral bus bar. The breaker requires this connection to power its internal ground-fault sensing circuitry.
Which electrical panels are compatible with the QF250A breaker?
This plug-on breaker is designed exclusively for use in Siemens EQ, ES, PL, and Ultimate load centers. It should not be installed in panels from other manufacturers unless specifically cross-listed by the panel's documentation.
Can I use the QF250A for equipment protection instead of personnel protection?
The QF250A is a Class A GFCI breaker designed specifically for personnel protection with a 5mA trip threshold. If your application requires equipment protection with a 30mA trip threshold, you will need a Siemens QE series breaker instead.
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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!