This part is a kind of semiconductor called 2SD655.

Function of this product has NPN Silicon Epitaxial Planar Transistor.

Manufacturers : SEMTECH

Image and pinout :

Some of the text within the PDF file :

ST 2SD655 NPN Silicon Epitaxial Planar Transistor for switching and AF amplifier applications. The transistor is subdivided into three groups, D, E and F, according to its DC current gain. On special request, these transistors can be manufactured in different pin configurations. TO-92 Plastic Package Weight approx. 0.19g Absolute Maximum Ratings (Ta = 25℃) Symbol Collector Base Voltage Collector Emitter Voltage Emitter Base Voltage Collector Current Collector Peak Current Power Dissipation Junction Temperature Storage Temperature Range VCBO VCEO VEBO IC ic(peak) Ptot Tj TS Value 30 15 5 700 1000 500 150 -55 to +150 Unit V V V mA mA mW O O C C SEMTECH ELECTRONICS LTD. (Subsidiary of Sino-Tech International Holdings Limited, a company listed on the Hong Kong Stock Exchange, Stock Code: [ ... ]

2SD655 PDF Datasheet Download