QA120AFCH model distinction: Siemens QA120AFCH is the high-interrupt version of its 20-amp pigtail-neutral combination AFCI. It is intended for one 120-volt branch circuit in equipment that lists the matching Siemens breaker family.
QA120AFCH specifications
-
Catalog number: QA120AFCH
-
Branch rating: 20A, 1-pole, 120VAC
-
Arc-fault type: Combination AFCI
-
Interrupting rating: 22kA
-
Neutral format: Pigtail
Why the final “H” matters
The H suffix identifies the higher short-circuit rating. A 10kA QA120AFC may look similar but is not an equal substitution where the specified available fault-current rating requires 22kA. This AFCI model also does not supply Class A GFCI protection.
Selection and installation
Check the panel label, full catalog number, system fault-current calculation, branch conductor, neutral path, and current code requirements. Do not choose by handle color or case shape alone. A qualified electrician should install the breaker and confirm its test and trip-indication operation.