Tstg Semiconductor Group Semiconductor Group 11 Sep-07-1998 1998-11-01 BAT 64...W Thermal Resistance Junction - ambient 1) BAT 64W Junction - ambient 1) BAT 64-04/06W Junction - ambient 1) BAT 64-05W Junction - soldering point BAT 64W Junction - soldering point BAT 64-04/06W Junction - solderin.