The 2SC3198 is a 60V 150mA 400mW NPN General Purpose Transistor TO-92 Package. This NPN Silicon Epitaxial Planar Transistor for switching and AF amplifier applications.
The 2SC3209 is a NPN Maximum Collector 2W Maximum Collector Base Voltage 300 V Maximum Collector Current 0.2 A Max. Operating Junction Temperature 125 °C Transition Frequency 80 MHz Forward Current Transfer Ratio 60.
The 2SC3228-Y transistor can have a current gain of 160 to 320. The gain of the 2SC3228 will be in the range from 60 to 320, for the 2SC3228-R it will be in the range from 60 to 120.