These are standard To-92 NPN BC547B transistors for general purposes.
This is a good general-purpose transformer for switching.
Very good to prototyping using boards on microcontroler.
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.
Type : NPN
Model : BC547B
Package type : TO-92
Black Body Size: 4.5mm x 3mm x 4.5mm
Pin Diameter: 0.4mm
100 ( +/-2 ) x NPN Transistors