Siemens BF120AHH GFCI Molded Case Circuit Breaker
- 20A
- 1 Pole
- Bolt-On
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Siemens BF120AHH - 20A GFCI Molded Case Circuit Breaker
New
Quantity
Description
Part of the BLHF frame family, the Siemens BF120AHH is a 1-pole, 20A bolt-on circuit breaker designed for commercial and industrial applications. It installs into Siemens P1, P2, and P3 panelboards to provide reliable power distribution and safety. Featuring a high 65kAIC interrupting rating at 120VAC, this unit delivers Class A 5mA ground fault protection. It includes an automatic self-test and lockout feature to ensure continuous safety compliance with NEC requirements for wet locations.Specifications
| Brand | Siemens |
|---|---|
| Part Number | BF120AHH |
| Series | BF |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 65kA @ 120VAC |
| Frame Type | B |
|---|---|
| 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 |
| 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, Non-Interchangeable Trip |
Product FAQs
8 answersWhat does the HH in the BF120AHH catalog number indicate?
The HH suffix designates a high interrupting rating of 65kAIC at 120VAC. This is significantly higher than the standard 10kAIC rating found on the base BF120A model.
What level of ground fault protection does the BF120AHH provide?
It provides Class A ground fault protection, which de-energizes the circuit when a current imbalance of 5mA is detected. This is intended for personnel protection in wet or hazardous locations.
How is the neutral connection wired on the BF120AHH?
This breaker features a pigtail neutral wire that must be connected directly to the panelboard neutral bar. The load neutral must also land on the breaker itself for the ground fault circuitry to function properly.
Can I use the BF120AHH to replace a standard BQD or BL breaker?
Yes, it can replace a standard 1-pole 20A bolt-on breaker in Siemens panelboards if Class A GFCI protection is required, provided there is space to land the neutral pigtail.
Does the BF120AHH include a self-test feature?
Yes, modern Siemens GFCI breakers include an automated self-test function that periodically verifies the internal ground fault circuitry is working to comply with current UL safety standards.
What is the difference between the BF120AHH and the QF120AHH?
The BF120AHH is a bolt-on breaker designed for commercial panelboards, while the QF120AHH is a plug-on breaker typically used in residential load centers. Both offer 20A, 65kAIC GFCI protection.
Can this breaker be used on a shared neutral circuit?
No, single-pole GFCI breakers like the BF120AHH cannot be used on multi-wire branch circuits with shared neutrals, as this will cause nuisance tripping due to current imbalance.
Is the BF120AHH suitable for HVAC equipment?
Yes, this breaker is HACR rated, making it suitable for use with heating, air conditioning, and refrigeration equipment that requires ground fault protection.
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