This part is a kind of semiconductor called BCX41.

Function of this product has NPN Silicon AF and Switching Transistor (High breakdown voltage Low collector-emitter saturation voltage).

Manufacturers : Siemens Semiconductor Group

Image and pinout :

Some of the text within the PDF file :

BCX 41 BSS 64 NPN Silicon AF and Switching Transistor High breakdown voltage q Low collector-emitter saturation voltage q Complementary types: BCX 42, BSS 63 (PNP) q BCX 41 BSS 64 Type BCX 41 BSS 64 Marking EKs AMs Ordering Code (tape and reel) Q62702-C1659 Q62702-S535 Pin Configuration 1 2 3 B E C Package1) SOT-23 Maximum Ratings Parameter Collector-emitter voltage Collector-base voltage Emitter-base voltage Collector current Peak collector current Base current Peak base current Total power dissipation, TS = 79 ˚C Junction temperature Storage temperature range Thermal Resistance Junction - ambient 2) Junction - soldering point Rth JA Rth JS ≤ ≤ Symbol VCE0 VCB0 VEB0 IC ICM IB IBM Ptot Tj Tstg 80 120 5 Values BSS 64 BCX 41 125 125 5 800 1 100 200 330 150 – 65 … + 150 Uni [ ... ]

BCX41 PDF Datasheet Download