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Siemens BF240A GFCI Molded Case Circuit Breaker
- 40A
- 2 Pole
- Bolt-On
Siemens
BF240A
GFCI Molded Case Circuit Breaker
Brand
Siemens
SKU
BF240A
Quantity
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Siemens BF240A - 40A GFCI Molded Case Circuit Breaker
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Description
Built for commercial and industrial applications, the Siemens BF240A is a 40-amp, 2-pole ground fault circuit breaker. It provides reliable overcurrent protection for 120/240VAC electrical systems while safeguarding personnel against shock. This Type BLF breaker mounts into Siemens P1, P2, and P3 panelboards using a secure bolt-on connection. It serves as a direct replacement for the legacy BF240 model. Delivering a 10kAIC rating, it features Class A 5mA ground fault protection.Specifications
| Brand | Siemens |
|---|---|
| Series | BF |
| Amperage | 40A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | B |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3 Panelboards |
| 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 | 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, Self-Test |
Product FAQs
9 answersWhich panelboards are compatible with the Siemens BF240A?
This B-frame device is engineered to install in Siemens P1, P2, and P3 series distribution panelboards that support bolt-on branch breakers.
Can the BF240A be used in standard residential load centers?
No. This is a bolt-on circuit breaker and will not fit in plug-on load centers that require QP or QT style residential breakers. It requires a threaded bus connection typical of commercial panelboards.
What level of ground fault detection does this unit provide?
It features a Class A ground fault circuit interrupter (GFCI) rating. The breaker is calibrated to trip when it detects a ground fault current of 5mA (milliamps) to protect personnel from severe electric shock.
What does the LIG designation mean for the trip functions?
LIG indicates that the unit incorporates Long-Time thermal overload protection, Instantaneous magnetic short-circuit protection, and Ground-Fault sensing.
How is the neutral connection handled during installation?
The breaker comes equipped with a factory-installed pigtail neutral wire. This pigtail must be landed directly on the panelboard neutral bus to supply reference power to the internal GFCI sensing electronics.
What are the conductor capacity limits for the load lugs?
The mechanical load lugs are rated to accept solid or stranded copper (Cu) wire sizes from 8 AWG to 6 AWG, or aluminum (Al) wire sizes from 8 AWG to 4 AWG.
Is this a suitable replacement for older ITE ground fault breakers?
Yes. Siemens acquired the ITE brand, and current BF series breakers like the BF240A serve as direct replacements for obsolete ITE bolt-on models with identical electrical specifications.
What specific breaker type does the BF catalog number correspond to?
The BF240A falls under the Siemens Type BLFB classification, which identifies it as a bolt-on GFCI molded case circuit breaker for panelboard applications.
What are common applications for a 40A 2-pole GFCI breaker?
A Class A 5mA ground fault breaker is commonly mandated by the National Electrical Code (NEC) for hardwired 240V equipment in wet or damp locations, such as hot tubs, spas, and large pool pumps.
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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
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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!