2SD1683 SANYO Electric, Silicon NPN Power Transistor, 
Vcbo 60V, Vceo 50V, Vebo 6V, Ic 4A, Tc 25°C 10W, 150MHz,
Case type: TO-126, SOT-32,
Marking: D1683, Rank S: hFE1 140..280 
ECB 

Complementary PNP 2SB1143