This part is a kind of semiconductor called S9012.

Function of this product has PNP Silicon General Purpose Transistor.

Manufacturers : SeCoS

Image and pinout :

Some of the text within the PDF file :

Elektronische Bauelemente S9012 PNP Silicon General Purpose Transistor FEATURES RoHS Compliant Product A suffix of "-C" specifies halogen & lead-free Collector 33 Power dissipation PCM : 0.3 W Collector Current ICM : - 0.5 A Collector-base voltage V(BR)CBO : - 40 V Operating & storage junction temperature Tj, Tstg : - 55OC ~ + 150OC V 1 2 A L 3 Top View 12 G 1 Base BS 2 Emitter C D HK J SOT-23 Dim Min Max A 2.800 3.040 B 1.200 1.400 C 0.890 1.110 D 0.370 0.500 G 1.780 2.040 H 0.013 0.100 J 0.085 0.177 K 0.450 0.600 L 0.890 1.020 S 2.100 2.500 V 0.450 0.600 All Dimension in mm ELECTRICAL CHARACTERISTICS ( Tamp.=25OC unless otherwise specified) Parameter Symbol Test conditions MIN TYP MAX UNIT Collector-base breakdown voltage Collector-emitter breakdown voltage V(BR)CBO V [ ... ]

S9012 PDF Datasheet Download