These are standard To-92 NPN SS8050 transistors for general purposes.
This is a good general-purpose transformer for switching.
Very good to prototyping using boards on microcontroller.

Note:
With the flat face of transistor toward you with pins down, the terminals are as follows from left to right: Emitter, Base, Collector. This should be true for all transistors in the TO-92 case.

Parameter:
Type : NPN
Model : SS8050
Package type : TO-92
VCBO: 40V
VCEO: 25V
IC: 1.5A
PC: 625mW
Black Body Size: 4.5mm x 3mm x 4.5mm
Pin Diameter: 0.4mm

Package Content:
50 ( +/-2 ) x NPN Transistors