TOSHIBA Transistor Silicon NPN Epitaxial Planar Type 2SC4247 TV Tuner, UHF Oscillator Applications (common collector) 2SC4247 Unit: mm Transition frequency is high and dependent on current excellently. Maximum Ratings (Ta = 25°C) Characteristics Collector-base voltage Collector-emitter voltage Emitter-base voltage Base current Collector current Collector power dissipation Junction temperature Storage temperature range Symbol VCBO VCEO VEBO IB IC PC Tj Tstg Rating 20 12 3 15 30 100 12.