A992 - C1845 Audio Transistor Pair

A992 or 2SA992:

The A992 (commonly referred to as the 2SA992 or its modern equivalent onsemi KSA992) is a low-noise, silicon PNP bipolar junction transistor packaged in a TO-92 case. Its complimentary is C1845 or 2SC1845.

Applications:

# Low-noise audio frequency amplification
# Audio preamplifiers and input stages
# Small signal amplification

C1845 or 2SC1845

The C1845 (commonly designated by manufacturers as 2SC1845 or KSC1845) is a highly popular NPN silicon bipolar junction transistor (BJT) packaged in a standard TO-92 case. Its complimentary is A992 or 2SA992.

# Low-noise audio frequency amplification
# Audio pre-amplifiers and input stages
# Small signal amplification