Popular transistors.

2N3704 transistor.
Pinout. Datasheet.

Type Designator: 2N3704.
Package: TO-92, 1-emitter, 2-collector, 3-base.
Material of transistor: Si
Polarity: NPN
Total Devise power dissipation |PD|: 0,625W
Collector-base breakdown voltage |VCBO|: 50V
Collector-emitter breakdown voltage |VCEO|: 30V
Emitter-base breakdown voltage |VEBO|: 5V
Maximum collector current |Ic max|: 0,5A
Maximum junction temperature |Tj|: +150 C
Transition frequency (ft) : 100MHz
Output Capacitance |Cob|:12pF
Collector-emitter saturation voltage|VCE|:0,6V(IC=100mA,IB=5mA) Forward current transfer ratio |hFE| : 100-300(IC= 50mA,VCE=2V)