This part is a kind of semiconductor called C2120.

Function of this product has NPN Transistor.

Manufacturers : JIANGSU CHANGJIANG

Image and pinout :

Some of the text within the PDF file :

JIANGSU CHANGJIANG ELECTRONICS TECHNOLOGY CO., LTD TO-92 Plastic-Encapsulate Transistors 2SC2120 TRANSISTOR (NPN) FEATURES z High DC Current Gain z Complementary to 2SA950 TO – 92 1. EMITTER 2. COLLECTOR 3. BASE MAXIMUM RATINGS (Ta=25℃ unless otherwise noted) Symbol VCBO VCEO VEBO IC PC RθJA Tj Tstg Parameter Collector-Base Voltage Collector-Emitter Voltage Emitter-Base Voltage Collector Current Collector Power Dissipation Thermal Resistance From Junction To Ambient Junction Temperature Storage Temperature Value 35 30 5 0.8 600 208 150 -55~+150 Unit V V V A mW ℃/W ℃ ℃ ELECTRICAL CHARACTERISTICS (Ta=25℃ unless otherwise specified) Parameter Collector-base breakdown voltage Collector-emitter breakdown voltage Emitter-base breakdown voltage Collector cut-off current Coll [ ... ]

C2120 PDF Datasheet Download