This part is a kind of semiconductor called BCP53-16.

Function of this product has PNP Silicon AF Transistors (For AF driver and output stages High collector current).

Manufacturers : Siemens Semiconductor Group

Image and pinout :

Some of the text within the PDF file :

PNP Silicon AF Transistors BCP 51 ... BCP 53 For AF driver and output stages q High collector current q Low collector-emitter saturation voltage q Complementary types: BCP 54 … BCP 56 (NPN) q Type BCP 51 BCP 51-10 BCP 51-16 BCP 52 BCP 52-10 BCP 52-16 BCP 53 BCP 53-10 BCP 53-16 Marking BCP 51 BCP 51-10 BCP 51-16 BCP 52 BCP 52-10 BCP 52-16 BCP 53 BCP 53-10 BCP 53-16 Ordering Code (tape and reel) Q62702-C2107 Q62702-C2109 Q62702-C2110 Q62702-C2146 Q62702-C2112 Q62702-C2113 Q62702-C2147 Q62702-C2115 Q62702-C2116 Pin Configuration 1 2 3 4 B C E C Package1) SOT-223 1) For detailed information see chapter Package Outlines. Semiconductor Group 1 5.91 BCP 51 ... BCP 53 Maximum Ratings Parameter Collector-emitter voltage RBE ≤ 1 kΩ Collector-base voltage Emitter-base voltage Coll [ ... ]

BCP53-16 PDF Datasheet Download