Siemens B120DFH Dual Function Miniature Circuit Breaker
- 20A
- 1 Pole
- Bolt-On
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Siemens B120DFH - 20A Dual Function Miniature Circuit Breaker
New
Quantity
Description
Built for commercial safety, the Siemens B120DFH is a 1-pole, 20A dual function circuit breaker. It provides combination arc-fault (AFCI) and 5mA ground-fault (GFCI) protection to meet NEC requirements. This bolt-on breaker installs into Siemens P1 through P5 panelboards. It features Insta-Wire connections and accepts 14-8 AWG copper conductors. With an upgraded 22 kAIC rating at 120VAC, it includes a self-test function and an LED trip indicator to easily diagnose faults.Specifications
| Brand | Siemens |
|---|---|
| Part Number | B120DFH |
| Series | B |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 22kA @ 120VAC |
| Frame Type | B |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3, P4, P5 Panelboards |
| Wire Gauge | 14-8 AWG (Cu), 12-8 AWG (Al) |
| Max Wire | 8 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 | Dual Function (AFCI/GFCI) |
|---|---|
| Available Options | Padlock Attachment |
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR Rated, SWD, UL 1699, UL 489, UL 943 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, SWD Rated, Dual Function, Self-Test, Visual Trip Indicator, Insta-Wire |
Product FAQs
5 answersWhat panelboards are compatible with the B120DFH?
The B120DFH is a bolt-on breaker designed for use in Siemens P1, P2, P3, P4, and P5 panelboards. It is not compatible with standard plug-in residential load centers.
What does Dual Function mean on the B120DFH?
Dual function indicates that the breaker provides both Combination Type Arc Fault Circuit Interrupter (AFCI) and Class A 5mA Ground Fault Circuit Interrupter (GFCI) protection in a single device. This allows a single breaker to meet NEC requirements for circuits requiring both types of protection.
How is the neutral connected on the B120DFH?
This breaker features a pigtail neutral connection. The attached pigtail wire must be routed and secured to the panelboard neutral bar to ensure the AFCI and GFCI safety features operate correctly.
What is the difference between the B120DF and the B120DFH?
The H in B120DFH indicates a higher interrupting rating. The B120DFH is rated for 22kAIC at 120VAC, whereas the standard B120DF is rated for 10kAIC.
Does the B120DFH include a self-test feature?
Yes, Siemens dual function breakers include an automatic self-test feature that periodically verifies the internal AFCI and GFCI circuitry is functioning properly. They also feature LED trip indicators to help diagnose the cause of a fault.
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