This part is a kind of semiconductor called C640.
Function of this product has NPN Silicon Epitaxial Planar Transistor.
Manufacturers : ETC
Image and pinout :
Some of the text within the PDF file :
2SC640 NPN Silicon Epitaxial Planar Transistor for switching and AF amplifier applications. The transistor is subdivided into five groups R, O, Y, P and L, according to its DC current gain. As complementary type the PNP transistor 2SA733 is recommended. On special request, these transistors can be manufactured in different pin configurations. 1. Emitter 2. Collector 3. Base TO-92 Plastic Package Weight approx. 0.19g Absolute Maximum Ratings (Ta = 25℃) Parameter Collector Base Voltage Collector Emitter Voltage Emitter Base Voltage Collector Current Power Dissipation Junction Temperature Storage Temperature Range Symbol VCBO VCEO VEBO IC Ptot Tj TS Value 40 30 5 100 150 150 -55 to +150 Unit V V V mA mW O O C C Page 1 of 2 7/15/2011 Free Datasheet http://www.nDatasheet.com Characteri [ ... ]