Siemens B120AFCH AFCI Miniature Circuit Breaker
- 20A
- 1 Pole
- Bolt-On
Quantity
Siemens B120AFCH - 20A AFCI Miniature Circuit Breaker
New
Quantity
Description
Engineered for commercial and industrial environments, the Siemens B120AFCH provides 20A of combination arc-fault mitigation. It monitors 120V circuits to detect hazardous arcing. The 1-pole bolt-on design is compatible with Siemens P1 through P5 panelboards. It acts as a direct replacement for the older B120AFH branch/feeder breaker. Boasting a high 22kAIC rating, this unit includes a pigtail neutral and a visual LED trip indicator for rapid diagnostics.Specifications
| Brand | Siemens |
|---|---|
| Series | BL |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 22kA @ 120VAC |
| 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 | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Special Classification | AFCI |
|---|---|
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
| Accessories | Pigtail Neutral |
| Standards | CSA C22.2 No. 5, UL 489, UL 1699 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, SWD Rated, High Interrupting Capacity, Visual Trip Indicator |
Product FAQs
8 answersWhat panelboards are compatible with the Siemens B120AFCH?
This bolt-on breaker is designed for use in Siemens P1, P2, P3, P4, and P5 commercial panelboards. It is not compatible with standard plug-on residential load centers.
What is the difference between the Siemens B120AFC and B120AFCH?
The B120AFCH features a higher interrupting rating of 22kAIC, whereas the standard B120AFC is rated for 10kAIC. Both are 20A, 1-pole combination AFCI bolt-on breakers for the BL series.
Can I use the 22kAIC B120AFCH in a panel that only requires a 10kAIC rating?
Yes, breakers with a higher interrupting rating like this 22kAIC model can safely be installed in systems requiring a lower rating, such as 10kAIC, provided all other specifications match.
What does Combination Arc Fault mean on this breaker?
A combination AFCI breaker protects against both parallel arcing, which occurs line-to-neutral or line-to-ground, and series arcing, which happens along a single broken conductor. This provides comprehensive protection against electrical fires.
How is the neutral connected on the B120AFCH?
This breaker features a pigtail neutral connection. The coiled white wire must be routed and secured directly to the neutral bus bar of the panelboard for the arc fault detection circuitry to function properly.
Can I use the B120AFCH to replace a standard BL series 20A breaker?
Yes, if your local electrical code requires upgrading a branch circuit to AFCI protection, this breaker will fit in the same bolt-on mounting space as a standard 1-pole 20A BL series breaker.
What wire sizes are accepted by the load terminals on the B120AFCH?
The breaker lugs accept 14 to 10 AWG copper wire or 12 to 10 AWG aluminum wire, which accommodates the standard wire gauges typically used for 20A branch circuits.
Does this breaker provide ground fault (GFCI) protection?
No, the B120AFCH is a combination arc fault circuit interrupter (CAFCI) only. It does not provide Class A ground fault protection. If both are required, a dual function (AFCI/GFCI) breaker is necessary.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 35 reviews.
- TSTom S.Verified BuyerReviewingSiemens B3100 3 Pole Circuit BreakerI recommend this productRated 5 out of 5 stars8/3/26Superbreakers is our go to!
Great prices, great service and quick delivery.
- MGMaggie G.Verified BuyerReviewingSiemens B250 - 50A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/24/26Great Service
Came in great condition and in an incredibly timely manner. Will continue superbreakers for all of my orders in the future!
- DBDonnie B.Verified BuyerReviewingSiemens B115 - 15A 1 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/11/26New Breaker
Awesome breaker & Superbreakers is a awesome company!
- BLBrian L.Verified BuyerReviewingSiemens B120 - 20A 1 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/4/26Brian
Works great
- JFJoseph F.Verified BuyerReviewingSiemens B120 - 20A 1 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars3/23/26Great value
It was a great value