Siemens Q120AFH AFCI Miniature Circuit Breaker
- 20A
- 1 Pole
- Plug-On
Quantity
Siemens Q120AFH - 20A AFCI Miniature Circuit Breaker
New
Quantity
Description
Designed to detect line-to-ground and line-to-neutral arcing faults, this 20-amp single-pole breaker delivers reliable branch/feeder AFCI protection. The unit features a high interrupting capacity of 22kA at 120V, making it suitable for electrical systems requiring elevated fault current ratings. It mounts into standard Siemens load centers and utilizes a traditional pigtail neutral connection. The thermal-magnetic trip mechanism is complemented by advanced electronic arc-fault sensing.Specifications
| Brand | Siemens |
|---|---|
| Series | Q |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | Plug-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 22kA @ 120VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Load Centers |
| Wire Gauge | 14-8 AWG (Cu), 12-8 AWG (Al) |
| Max Wire | 8 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Special Classification | AFCI |
|---|---|
| Available Options | Padlock Attachment |
| Accessories | Pigtail Neutral |
| Standards | HACR, SWD, UL 1699, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, SWD Rated, Insta-Wire, LED Trip Indicator, High Interrupting Capacity |
Product FAQs
5 answersWhich load centers are compatible with the Q120AFH breaker?
This breaker is designed for use in Siemens EQ, PL, and ES series load centers. It mounts into standard 1-inch spaces that accept Type QAFH or QP style breakers.
What is the difference between the Siemens Q120AF and Q120AFH?
The H in the Q120AFH part number indicates a higher interrupting rating. The Q120AFH is rated for 22kAIC at 120V, while the standard Q120AF is rated for 10kAIC.
How does the pigtail neutral on the Q120AFH connect during installation?
The breaker includes a coiled white pigtail wire that must be routed and secured directly to the neutral bus bar in your load center to power the internal arc fault circuitry.
Can the Q120AFH be installed in a Plug-On Neutral panel?
Yes. While it is not a Plug-On Neutral breaker itself, it can still be used in a Plug-On Neutral panel by manually connecting its pigtail wire to the neutral bus bar.
What does combination arc fault protection mean for this breaker?
Combination AFCI breakers are designed to detect both parallel arcing, which occurs between two different wires, and series arcing, which is caused by a break or loose connection in a single wire. This provides comprehensive protection against electrical fires.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 47 reviews.
- CGCrocefissa G.Verified BuyerReviewingSiemens Q115 - 15A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/18/26Quick delivery and great price.
The circuit breakers are at a great cost.
- JBJason B.Verified BuyerReviewingSiemens Q2150B - 150A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/18/26Great experience
The product was exactly what I needed and it arrived on time.
- DQDon Q.Verified BuyerReviewingSiemens Q3100 - 100A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/14/26Siemens breaker
Great customer experience, great prices and fast shipping... Definitely will be buying her again.
- CSChristopher S.Verified BuyerRated 5 out of 5 stars8/12/26Siemens 60
Perfect new condition
- GSGeorge S.Verified BuyerReviewingSiemens Q2150B - 150A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars3/4/26Great service
Every time I call or go online you have the parts I'm looking for.