This part is a kind of semiconductor called KN2222S.

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. FEATURES Low Leakage Current : ICEX=10nA(Max.) ; VCE=60V, VEB(OFF)=3V. Low Saturation Voltage : VCE(sat)=0.3V(Max.) ; IC=150mA, IB=15mA. Complementary to the KN2907S/2907AS. MAXIMUM RATING (Ta=25 ) CHARACTERISTIC RATING SYMBOL UNIT KN2222S KN2222AS Collector-Base Voltage VCBO 60 75 V Collector-Emitter Voltage VCEO 30 40 V Emitter-Base Voltage VEBO 5 6V Collector Current IC 600 mA Collector Power Dissipation (Ta=25 ) PC PC * 150 mW 350 Junction Temperature Tj 150 Storage Temperature Range Tstg -55 150 Note : * Package Mounted On 99.5% Alumina 10 8 0.6 ) KN2222S/AS EPITAXIAL PLANAR NPN TRANSISTOR E L BL DIM MILLIMETERS A 2.93+_ 0.20 B 1.30+0.20/-0.15 A G H D 23 C 1.30 MAX D 0.4 [ ... ]

KN2222S PDF Datasheet Download