Popular transistors.

BC143 transistor.
Pinout. Datasheet.

Type Designator: BC143.
Package: TO-39, 1-collector, 2-base, 3-emitter.
Material of transistor: Si
Polarity: PNP
Total Devise power dissipation |PD|: 0.8 W(at ambient temperature + 25 )
Collector-base breakdown voltage |VCBO|: 60V
Collector-emitter breakdown voltage |VCEO|: 60V
Emitter-base breakdown voltage |VEBO|: 5V
Maximum collector current |Ic max|: 1A
Maximum junction temperature |Tj|: +200C
Transition frequency (ft) : 100MHz(min)
Collector-base Capacitance|Cob |:13pF
Collector-emitter saturation voltage|VCE|:300mV(IC=500mA,IB=25mA),
1,2 V(IC=1000mA,IB= 50mA).
Forward current transfer ratio |hFE| : 85(IC=10mA,VCE=10V) .