View 2sc3771 datasheet:

Ordering number:EN1944B NPN Epitaxial Planar Silicon Transistor 2SC3771 UHF, VHF Oscillator Mixer, HF Amplifier Applications Applications Package Dimensions · UHF/VHF frequency converters, local oscillators, HF unit:mm amplifiers. 2018A [2SC3771] Features · High power gain : PG=10dB typ (f=0.9GHz). PG=16dB typ (f=0.4GHz). · Small noise figure : NF=3.5dB typ (f=0.9GHz). · High cutoff frequency : fT=2.2GHz typ. C : Collector B : Base E : Emitter SANYO : CP Specifications Absolute Maximum Ratings at Ta = 25?C Parameter Symbol Conditions Ratings Unit Collector-to-Base Voltage VCBO 30 V Collector-to-Emitter Voltage VCEO 20 V Emitter-to-Base Voltage VEBO 3 V Collector Current IC 30 mA Base Current IB 10 mA Collector Dissipation PC 250 mW Junction Temperature Tj 1