Dear TANDBERGEREN,

Do you mean if I don't have MOSFET but have a transistor with higher current or voltage like 2A, 80V, then the transistor is good enough for my use?

A BD237 is a good one, if You can't find a mosfet instead.
Just have in mind: SOA, wich is the area wich the transistor should operate within.
As for the BD237: You never can have both 100V over the C-E at the same time You draw 1A through it.
20W should me maximum, at any voltages*currents. Eh, as long as You maintain a temperature of the chip lower than about 100°C
Read the datasheets carefully, and You find all the info you need.

 

See

 

Nice, Bordodynov.

Superb when someone can provide good and positive information rather than pointing at the impossible.

As one can see.
A split darlingtonconfiguration will work just fine with a PN2222 and a BD135.
Collector of theBD135 can be connected to the negative connection to the motor.
Collector of the PN2222 to the 3V supply.
Base of the PN2222 will need just a tiny current to saturate the BD135
A pleasant 239mV is all we loose over the BD135.

Thank You.

 

I brought to the figure the power of each transistor: