This part is a kind of semiconductor called 2N3904SC.

Function of this product has EPITAXIAL PLANAR NPN TRANSISTOR.

Manufacturers : KEC

Image and pinout :

Some of the text within the PDF file :

SEMICONDUCTOR TECHNICAL DATA GENERAL PURPOSE APPLICATION. SWITCHING APPLICATION. 2N3904SC EPITAXIAL PLANAR NPN TRANSISTOR FEATURES Low Leakage Current : ICEX=50nA(Max.), IBL=50nA(Max.) @VCE=30V, VEB=3V. Excellent DC Current Gain Linearity. Low Saturation Voltage : VCE(sat)=0.3V(Max.) @IC=50mA, IB=5mA. Complementary to 2N3906SC. MAXIMUM RATING (Ta=25 ) CHARACTERISTIC SYMBOL RATING Collector-Base Voltage VCBO 60 Collector-Emitter Voltage VCEO 40 Emitter-Base Voltage VEBO 6 Collector Current IC 200 Base Current IB 50 Collector Power Dissipation PC * 350 Junction Temperature Tj 150 Storage Temperature Range Tstg -55 150 * PC : Package Mounted On 99.5% Alumina 10 8 0.6 ) UNIT V V V mA mA mW 2015. 5. 12 Revision No : 0 1/3 2N3904SC ELECTRICAL CHARACTERISTICS (Ta=25 [ ... ]

2N3904SC PDF Datasheet Download