Popular transistors.

BC107 transistor.
Pinout. Datasheet.

Type Designator: BC107.
Package: TO-18, 1-emitter, 2-base, 3-collector.
Material of transistor: Si
Polarity: NPN
Total Devise power dissipation |PD|: 0.3W(at ambient temperature ≤ + 25 )
Collector-base breakdown voltage |VCBO|: 50V
Collector-emitter breakdown voltage |VCEO|: 45V
Emitter-base breakdown voltage |VEBO|: 6V
Maximum collector current |Ic max|: 0.1A
Maximum junction temperature |Tj|: +175 C
Transition frequency (ft) : 250MHz
Emitter-Base Capacitance |Cebo|:12pF
Collector-Base Capacitance|Ccbo|:4pF
Collector-emitter saturation voltage|VCE|:70mV(IC=10mA,IB=0,5mA),
0,2V(IC=100mA,IB=5mA)
Base-emitter saturation voltage|VBE|:0,7V(IC=10mA,IB=0,5mA),
0,9V(IC=100mA,IB=5mA)
Forward current transfer ratio |hFE| : 110-450,(IC=2mA,VCE=5V),
Noise Figure, (NF): 2-10dB