Free Shipping Over $99
Siemens BF120A GFCI Molded Case Circuit Breaker
- 20A
- 1 Pole
- Bolt-On
Siemens
BF120A
GFCI Molded Case Circuit Breaker
Brand
Siemens
SKU
BF120A
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Siemens BF120A - 20A GFCI Molded Case Circuit Breaker
New
Quantity
Similar Items
20A GFCI Molded Case Circuit Breaker
20A GFCI Molded Case Circuit Breaker
20A GFCI Molded Case Circuit Breaker
Description
Part of the modern Siemens lineup, the BF120A is a 20-amp, single-pole GFCI breaker designed for commercial electrical systems. Operating at 120VAC, it provides critical 5mA Class A ground fault protection for wet locations. This bolt-on breaker installs into Siemens P1, P2, and P3 panelboards and serves as the drop-in replacement for older BF120 models. Rated at 10kAIC, it features an automated self-test function that periodically verifies the internal ground fault circuitry is working.Specifications
| Brand | Siemens |
|---|---|
| Part Number | BF120A |
| Series | BF |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens P1, P2, P3 Panelboards |
| Wire Gauge | 14-10 AWG (Cu), 12-10 AWG (Al) |
| Max Wire | 10 AWG |
| 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 Thermal, Fixed Magnetic |
| Special Classification | GFCI |
|---|---|
| Available Options | Padlock Attachment |
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, UL 489, UL 943, NEMA AB 1 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, SWD Rated, Self-Test |
Product FAQs
5 answersWhich Siemens panelboards accept the BF120A circuit breaker?
The BF120A is engineered for installation in Siemens P1, P2, and P3 distribution panelboards. Its bolt-on mechanical design ensures a secure, high-contact connection to the panel busbars in commercial and industrial electrical systems.
What is the ground fault trip threshold for this breaker?
The BF120A features a 5 mA leakage trip threshold. This classifies it as a Class A Ground Fault Circuit Interrupter (GFCI), which is strictly designed to protect personnel from hazardous electrical shocks.
How is the neutral connection handled on the BF120A?
This breaker is equipped with a factory-installed neutral pigtail wire. During installation, the pigtail must be routed and securely landed on the panelboard neutral assembly to power the internal ground fault detection electronics.
How can electricians verify the ground fault protection is operational after installation?
The front of the breaker includes a dedicated push-to-test button. Pressing this button safely simulates a ground fault, allowing technicians to confirm that the internal circuitry accurately detects the leakage and trips the breaker mechanism.
What specific breaker frame type does the BF120A belong to?
This breaker falls under the Siemens BLF and BLF2 product classifications. These designations identify its physical footprint, 10kA interrupting capacity, and bolt-on configuration for commercial panelboard applications.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.
Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 17 reviews.
Total 5 star reviews: 17 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
Search
Rating
17 reviews
- PDPaul D.Verified BuyerReviewingSiemens BF120A - 20A GFCI Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/25/26Fast ship
Thanks
- ESEric S.Verified BuyerReviewingSiemens BF120A - 20A GFCI Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars3/20/2620amp Breaker
Worked as advertised. I have ordered a few times and pricing is great !!
- APAlex P.ReviewingSiemens BF230A - 30A GFCI Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars12/12/23Works as it should! Order
Works as it should! Order was received on time. No complaints!
- SCSIMON C.ReviewingSiemens BF230A - 30A GFCI Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/29/23I am very happy with
I am very happy with price and service, the delivery was on time, I recommend to everybody, this company is honest.
- CDCatherine D.ReviewingSiemens BF230 - 30A GFCI Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/3/22Service was excellent!
Service was excellent!