This part is a kind of semiconductor called 2SD669.

Function of this product has BIPOLAR POWER GENERAL PURPOSE TRANSISTOR.

Manufacturers : UTC

Image and pinout :

Some of the text within the PDF file :

UNISONIC TECHNOLOGIES CO., LTD 2SD669/A BIPOLAR POWER GENERAL PURPOSE TRANSISTOR 1 SOT-223 NPN SILICON TRANSISTOR 1 SOT-89 APPLICATIONS * Low frequency power amplifier complementary pair with UTC 2SB649/A 1 TO-92 1 TO-92NL 1 TO-126C 1 TO-126 1 TO-251 1 TO-252 *Pb-free plating product number: 2SD669L/2SD669AL ORDERING INFORMATION Order Number Normal Lead Free Plating 2SD669-x-AA3-R 2SD669L-x-AA3-R 2SD669-x-AB3-R 2SD669L-x-AB3-R 2SD669-x-T60-K 2SD669L-x-T60-K 2SD669-x-T6C-R 2SD669L-x-T6C-R 2SD669-x-T92-B 2SD669L-x-T92-B 2SD669-x-T92-K 2SD669L-x-T92-K 2SD669-x-T9N-B 2SD669L-x-T9N-B 2SD669-x-T9N-K 2SD669L-x-T9N-K 2SD669-x-T9N-R 2SD669L-x-T9N-R 2SD669-x-TM3-T 2SD669L-x-TM3-T 2SD669-x-TN3-R 2SD669L-x-TN3-R 2SD669-x-TN3-T 2SD669L-x-TN3-T Package SOT-223 SOT-89 TO-126 [ ... ]

2SD669 PDF Datasheet Download