This part is a kind of semiconductor called 3DD2901.

Function of this product has CASE-RATED BIPOLAR TRANSISTOR.

Manufacturers : Jilin Sino

Image and pinout :

Some of the text within the PDF file :

R µÍÆ·Å´ó¹Ü¿Ç¶î¨ÄË«¼Ð;§Ìå CASE-RATED BIPOLAR TRANSISTOR FOR TYPE 3DD2901 FOR LOW FREQUENCY 3DD2901 Ö÷Òª²ÎÊý BVCBO IC VCE(sat) tf ÓÃ; z ²ÊÉ«µçÊÓ»úÐä³öµç· MAIN CHARACTERISTICS 1500 V 8 3 0.3 A V(max) ¦Ì s(max) ·â×° Package TO-3P(H)IS APPLICATIONS z Horizontal deflection output for color TV. 1 2 3 ²úÆ·ÌØÐÔ z 3DD2901 ÊÇ ¸ß·´Ñ¹ó¦Âʾ§ÌåÜ£¬ ÔìÖвÉÓõÄÖ÷Òª¹¤ÒÕ¼ ÊõÓУº¸ßѹ̨Ã湤ÒÕ¼ Êõ¡¢ÈýÖØÀ©É¼µ ÓÃËÜÁÏÈ«°ü·â½á¹¡£ £¨ RoHS£Æ·¡£©²ú NPN Ë«¼ÐÍ ÖÆ FEATURES z 3DD2901 is high breakdown µÈЧç· EQUIVALENT CIRCUIT voltage of NPN bipolar transistor. The main process of manufacture: high voltage mesa type process, triple [ ... ]

3DD2901 PDF Datasheet Download