2SD1991A, Matsushita-Panasonic, Silicon NPN Epitaxial Planar Transistor, 
Vcbo 60V, Vceo 50V, Vebo 7V, Ic 100mA, Tc 25°C 400mW, 150MHz, hFE >160 
Case type: TO-92S, 
Marking: D1991AQ, 
ECB 

Complementary PNP 2SB1320A