D1780 
It's made by NEC.. i have the datasheet.. will post it if i knew how :)
Full part number  2SD1780
2 Amp, 50 V, NPN, E-C-B (1-2-3)[pins], Hfe = 800 to 3200
I think i found a Cross for it   2SD21780  made by panasonic found at DIGIKEY
 |  Attachment?:  |  Modify:  |  Size:  |  Date:  |  Who:  |  Comment:  |  
    2SD1780.pdf      |   mod      |   145602   |   10 Oct 2004 - 08:51   |   sens   |   Datasheet 2SD1780   |  
 
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