Siemens QA120AFCH AFCI Miniature Circuit Breaker
- 20A
- 1 Pole
- Plug-On
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Siemens QA120AFCH - 20A AFCI Miniature Circuit Breaker
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Description
Delivering combination arc-fault protection, the Siemens QA120AFCH is a 20A single-pole breaker for residential and commercial applications. This plug-on unit features a pigtail neutral connection and mounts into Siemens EQ, PL, ES, and Ultimate load centers. It utilizes thermal-magnetic technology for overload and short-circuit defense. Rated at 22kAIC at 120VAC, it provides higher interrupting capacity than standard breakers. An LED trip indicator helps identify fault causes.Specifications
| Brand | Siemens |
|---|---|
| Part Number | QA120AFCH |
| Series | QA |
| 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 EQ, PL, ES, Ultimate Load Centers |
| 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 | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Special Classification | AFCI |
|---|---|
| Available Options | Padlock Attachment |
| Accessories | Pigtail Neutral |
| Standards | CSA C22.2 No. 5, UL 1699, UL 489 |
| Approval | CSA, HACR, SWD, UL |
| Temp Rating | 40C |
| Construction Features | Combination AFCI, High Interrupting Capacity, HACR Rated, SWD Rated, Visual Trip Indicator, Insta-Wire |
Product FAQs
8 answersWhich load centers are compatible with the QA120AFCH circuit breaker?
This breaker is designed for use in Siemens EQ, PL, ES, and Ultimate series load centers that accept QP type breakers.
How is the neutral connection made on the QA120AFCH?
This model features a pigtail neutral wire that must be connected directly to the neutral bus bar in the load center, unlike plug-on neutral (PON) variants.
What does the H in the QA120AFCH catalog number signify?
The H indicates a high interrupting rating of 22kAIC at 120VAC, compared to the standard 10kAIC rating found on the base QA120AFC model.
What type of arc fault protection does this breaker provide?
It is a Combination Type Arc Fault Circuit Interrupter (CAFCI), meaning it protects against both parallel arcs (line-to-neutral or line-to-ground) and series arcs to meet NEC requirements for residential branch circuits.
What is the recommended tightening torque for the load terminals on this breaker?
The load terminals should be tightened to 25 lb-in. Always ensure connections are secure to prevent nuisance tripping or overheating.
Does the QA120AFCH feature diagnostic trip indicators?
Yes, it includes LED trip indicators near the handle. When the breaker is turned back on after a trip, the LEDs illuminate for 5 seconds to help electricians pinpoint the cause of the fault.
Can the QA120AFCH replace a standard 20A single-pole QP breaker?
Yes, it can replace a standard 20A 1-pole QP breaker, such as the Q120, in compatible Siemens panels when upgrading a circuit to meet current NEC arc fault requirements.
Can this single-pole AFCI be used on a multi-wire branch circuit with a shared neutral?
No. Single-pole AFCIs cannot be used on multi-wire branch circuits (MWBCs) with a shared neutral. A two-pole AFCI breaker is required for those applications to prevent nuisance tripping.
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