MPSW45A ON Semic, NPN One Watt Darlington Silicon Transistor,
Vces 50V, Vcbo 60V, Vebo 12V, Ic 1A, Pd 1W, fT 100MHz, 
DC Collector/Base Gain hFE Min: 4000, 25000, 15000,

Case type: TO92-3pin, TO-226AE,
MPSW45A =W45A, =MPSW45, 

1..Emitter 
2..Base 
3..Collector