View bcr158w datasheet:

BCR 158W PNP Silicon Digital Transistor • Switching circuit, inverter, interface circuit, driver circuit • Built in bias resistor (R1=2.2k?, R2=47k?) Type Marking Ordering Code Pin Configuration Package BCR 158W WIs UPON INQUIRY 1 = B 2 = E 3 = C SOT-323 Maximum Ratings Parameter Symbol Values Unit Collector-emitter voltage VCEO 50 V Collector-base voltage VCBO 50 Emitter-base voltage VEBO 5 Input on Voltage Vi(on) 10 DC collector current IC 100 mA Total power dissipation, TS = 124°C Ptot 250 mW Junction temperature Tj 150 °C Storage temperature Tstg - 65 ... + 150 Thermal Resistance 1) Junction ambient RthJA ? 240 K/W Junction - soldering point RthJS ? 105 1) Package mounted on pcb 40mm x 40mm x 1.5mm / 0.5cm2 Cu Semiconductor Group 1 Nov-26-1996 BCR 158W Electri