what are the specs of a transistor that can't be find on internet?
No picture? Anyway, if it is in a TO-220 package, then it looks like it might be an old Fujitsu (early 1980's) NPN BJT. A "2SD1035."

Maximum collector power dissipation: 40 W
Maximum collector-base voltage: 150 V
Maximum collector-emitter voltage: 120 V
Maximum emitter-base voltage: 100 V (Not sure I believe this one)
Maximum collector current: 3 A
Maximum junction temperature: 150°C
Transition frequency: 1 MHz
Forward current transfer ratio (hFE), min: 50
Package: TO220 


But that's just a guess given the D and the number you mentioned.