Siemens B120DFHH Dual Function Miniature Circuit Breaker
- 20A
- 1 Pole
- Bolt-On
Quantity
Siemens B120DFHH - 20A Dual Function Miniature Circuit Breaker
New
Quantity
Description
Rated for 65 kAIC at 120VAC, the Siemens B120DFHH is a high-interrupting 1-pole, 20A dual function circuit breaker. It combines arc-fault and ground-fault protection for demanding commercial applications. The bolt-on design installs into Siemens P1 through P5 panelboards. It is a bolt-on breaker with a pigtail neutral wire that lands on the panel neutral bar, and it accepts 14-10 AWG copper wiring. This HACR and SWD rated breaker features a self-test mechanism and an LED indicator to quickly pinpoint the cause of a trip.Specifications
| Brand | Siemens |
|---|---|
| Part Number | B120DFHH |
| Series | B |
| 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, P4, P5 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 | Dual Function (AFCI/GFCI) |
|---|---|
| Available Options | Padlock Attachment |
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR Rated, UL 489, UL 943, UL 1699 |
| Approval | CSA, HACR, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, SWD Rated, Dual Function, Self-Test, Visual Trip Indicator, Insta-Wire |
Product FAQs
6 answersWhich panelboards accept the Siemens B120DFHH circuit breaker?
This bolt-on breaker is designed specifically for installation in Siemens P1, P2, P3, P4, and P5 panelboards.
Does the B120DFHH require a specialized plug-on neutral panel?
No. This breaker is equipped with a pigtail neutral wire, meaning it can be installed in standard compatible panelboards by wiring the pigtail directly to the neutral bus.
What specific faults does the B120DFHH dual function breaker protect against?
As a dual function (AFCI/GFCI) device, it provides combination protection against dangerous arcing faults that can cause fires, as well as 5mA ground faults that pose a shock hazard to personnel.
What wire gauges are supported by the terminal lugs on this breaker?
The lugs accommodate 14 AWG to 10 AWG copper conductors, or 12 AWG to 10 AWG aluminum conductors.
What does the "HH" designation indicate on the B120DFHH?
The "HH" suffix denotes a high interrupting rating of 65kAIC at 120VAC. This allows the breaker to be safely applied in commercial and industrial electrical systems with high available fault currents.
How is the B120DFHH secured to the panel bus?
It utilizes a bolt-on connection type. This provides a highly secure, vibration-resistant mechanical and electrical bond to the panelboard busbars, which is standard for commercial applications.
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