This part is a kind of semiconductor called C2120.

Function of this product has Silicon NPN Transistor.

Manufacturers : INCHANGE

Image and pinout :

Some of the text within the PDF file :

INCHANGE Semiconductor isc Silicon NPN Transistor isc Product Specification 2SC2120 DESCRIPTION ·High hFE(1)=100-320 ·1 Watts Amplifier Applications ·Complement to Type 2SA950 APPLICATIONS ·Audio power amplifier Applications ABSOLUTE MAXIMUM RATINGS(Ta=25℃) SYMBOL PARAMETER VCBO Collector-Base Voltage VCEO Collector-Emitter Voltage VEBO Emitter-Base Voltage IC Collector Curren IB Base Curren PC Collector Power Dissipation @TC=25℃ TJ Junction Temperature Tstg Storage Temperature Range VALUE UNIT 35 V 30 V 5V 800 mA 160 mA 600 mW 150 ℃ -55~150 ℃ isc website：www.iscsemi.cn 1 INCHANGE Semiconductor isc Silicon NPN Transistor isc Product Specification 2SC2120 ELECTRICAL CHARACTERISTICS TC=25℃ unless otherwise specified SYMBOL PARAMETER CONDITIONS [ ... ]

C2120 PDF Datasheet Download