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Siemens BF250AH GFCI Molded Case Circuit Breaker
- 50A
- 2 Pole
- Bolt-On
Siemens
BF250AH
GFCI Molded Case Circuit Breaker
Brand
Siemens
SKU
BF250AH
Quantity
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Siemens BF250AH - 50A GFCI Molded Case Circuit Breaker
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Description
Delivering an upgraded 22kAIC interrupting rating, the BF250AH provides high-capacity ground fault protection for commercial and industrial facilities. This 50A, two-pole breaker features self-test technology to automatically verify its 5mA Class A leakage detection for wet environments. The unit utilizes a bolt-on mounting configuration for secure integration into Siemens P1, P2, and P3 panelboards. It is officially replaced by the newer B250GFH model. Includes standard LIG trip functions.Specifications
| Brand | Siemens |
|---|---|
| Part Number | BF250AH |
| Series | BF |
| Amperage | 50A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 22kA @ 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 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, NOM, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip, Non-Interchangeable Trip |
Product FAQs
6 answersWhat is the difference between the Siemens BF250A and the BF250AH?
The H in the BF250AH catalog number indicates a higher interrupting rating. The BF250AH is rated for 22kAIC at 240V, whereas the standard BF250A is rated for 10kAIC.
What level of ground fault protection does the BF250AH provide?
It provides Class A ground fault protection. This is designed for personnel safety and will trip the breaker when it detects leakage currents of 5mA.
Does the load circuit require a neutral connection for the BF250AH to operate?
A load neutral is not required for straight 240V loads. However, the breaker's white pigtail neutral wire must always be connected to the panel neutral bar to power the internal GFCI circuitry.
Can I use the BF250AH in a standard residential load center?
No. The BF250AH is a bolt-on breaker designed for commercial panelboards like the Siemens P1, P2, and P3. Standard residential load centers typically require plug-on breakers, such as the QPF series.
Does this breaker include a self-test feature?
Yes, it includes an automatic self-test feature that continuously monitors the ground fault circuitry to ensure it is working properly, complying with UL 943 safety standards.
How does the BF250AH handle false tripping in commercial environments?
Siemens GFCI breakers use residual differential current detection, comparing current out versus current in. This design provides superior performance and helps mitigate false tripping caused by RF interference or minor imbalances.
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