View bf517 datasheet:

BF 517 NPN Silicon RF Transistor • For amplifier and oscillator applications in TV-tuners Type Marking Ordering Code Pin Configuration Package BF 517 LRs Q62702-F42 1 = B 2 = E 3 = C SOT-23 Maximum Ratings of any single Transistor Parameter Symbol Values Unit Collector-emitter voltage VCEO 15 V Collector-base voltage VCBO 20 Emitter-base voltage VEBO 2.5 Collector current IC 25 mA Peak collector current ICM f ? 10 MHz 50 Total power dissipation Ptot mW TS ? 55 °C 280 Junction temperature Tj 150 °C Ambient temperature TA - 65 + 150 Storage temperature Tstg - 65 ... + 150 Thermal Resistance 1) Junction - soldering point RthJS ? 340 K/W 1) Package mounted on aluminia 15 mm x 16,7 mm x 0,7 mm Semiconductor Group 1 Aug-02-1996 BF 517 Electrical Characteristics at TA