View bfp181r datasheet:

BFP 181R NPN Silicon RF Transistor • For low noise, high-gain broadband amplifiers at collector currents from 0.5mA to 12mA • fT = 8GHz F = 1.45dB at 900MHz ESD: Electrostatic discharge sensitive device, observe handling precaution! Type Marking Ordering Code Pin Configuration Package BFP 181R RFs Q62702-F1685 1 = E 2 = C 3 = E 4 = B SOT-143R Maximum Ratings Parameter Symbol Values Unit Collector-emitter voltage VCEO 12 V Collector-emitter voltage VCES 20 Collector-base voltage VCBO 20 Emitter-base voltage VEBO 2 Collector current IC 20 mA Base current IB 2 Total power dissipation Ptot mW TS ? 75 °C 175 Junction temperature Tj 150 °C Ambient temperature TA - 65 ... + 150 Storage temperature Tstg - 65 ... + 150 Thermal Resistance 1) Junction - soldering point RthJ