2SD1274, Matsushita, ISC Semic, Silicon NPN power Transistor, 
Vcbo 150V, Vceo 80V, Vebo 6V, Ic 5A, Tc 25°C 40W, 40MHz, 
Case type: TO-220F-ISOL,
Marking: D1274, Rank P: hFE 800..2000
BCE