2617
I lean more and more for a bipolar standard transistor. “m9017” corresponds to the date of manufacture, that is to say the 17th week of 1990. I continue to seek infos if I find; once one with the datasheet, it is simple to find an equivalent.
Edict: bond of a supplier of obsolete semiconductors: http://client.icsource.com/ICSourceWDL/ … amp;page=1
Does on973 seem to be of manufacture “pH” (?) and of equivalent BDT65. The datasheet of the BDT 65 gives: http://pdf.alldatasheet.com/datasheet-p … DT65.html.
It is thus about a bipolar transistor standard NPN, with mini Vce of 60V and one Ic continuous minis of 12A. The case is a TO220 (in conformity with your photograph). If the tien is of plastic type, you can replace it by a not-plastic on the condition of using insulating tape against the radiator (to isolate the sole from the transistor). If you go in a salesman of electronic components, go ahead with the complete specification, it will not have evil to find you an equivalent; in particular, attention with stitching. Leg 1 for the base, leg 2 for the collector, leg 3 for the transmitter.
For example, semiconductor the BDW42 is proposed: http://www.onsemi.com/site/products/sum … 42,00.html
Det där fick jag fram via översättningsprogram..
och ja du får nog förklara på icke-elektriker-svenska 
MVH.
