This part is a kind of semiconductor called BCR141.
Function of this product has NPN Silicon Digital Transistor (Switching circuit/ inverter/ interface circuit/ driver circuit).
Manufacturers : Siemens Semiconductor Group
Image and pinout :
Some of the text within the PDF file :
BCR 141 NPN Silicon Digital Transistor • Switching circuit, inverter, interface circuit, driver circuit • Built in bias resistor (R1=22kΩ, R2=22kΩ) Type BCR 141 Marking Ordering Code WDs Q62702-C2258 Pin Configuration 1=B 2=E 3=C Package SOT-23 Maximum Ratings Parameter Collector-emitter voltage Collector-base voltage Emitter-base voltage Input on Voltage DC collector current Total power dissipation, TS = 102°C Junction temperature Storage temperature Symbol Values 50 50 10 30 100 200 150 - 65 ... + 150 mA mW °C Unit V VCEO VCBO VEBO Vi(on) IC Ptot Tj Tstg Thermal Resistance Junction ambient 1) RthJA RthJS ≤ 350 ≤ 240 K/W Junction - soldering point 1) Package mounted on pcb 40mm x 40mm x 1.5mm / 6cm2 Cu Semiconductor Group 1 Nov-26-1996 BCR 141 Electrical Char [ ... ]