View 2sc4861 datasheet:

Ordering number:EN4581 NPN Epitaxial Planar Silicon Transistor 2SC4861 UHF Converter, Local Oscillator Applications Features Package Dimensions · High cutoff frequency : fT=6.5GHz typ. unit:mm 2 · High gain : ? S21e? =11.5dB typ (f=1GHz). 2018B · Small Cob : NF=0.65pF typ. [2SC4861] 0.4 0.16 3 0~0.1 1 0.95 2 0.95 1.9 2.9 1 : Base 2 : Emitter 3 : Collector SANYO : CP Specifications Absolute Maximum Ratings at Ta = 25?C Parameter Symbol Conditions Ratings Unit Collector-to-Base Voltage VCBO 20 V Collector-to-Emitter Voltage VCEO 10 V Emitter-to-Base Voltage VEBO 2 V Collector Current IC 30 mA Collector Dissipation PC 200 mW Junction Temperature Tj 150 ?C Storage Temperature Tstg –55 to +150 ?C Electrical Characteristics at Ta = 25?C Ratings Parameter