This part is a kind of semiconductor called C2120.

Function of this product has Silicon NPN Epitaxial Type Transistor.

Manufacturers : Toshiba Semiconductor

Image and pinout :

Some of the text within the PDF file :

1112SC2120 TOSHIBA Transistor Silicon NPN Epitaxial Type (PCT process) 2SC2120 Audio Power Amplifier Applications Unit: mm • High hFE: hFE (1) = 100~320 • 1 watts amplifier applications. • Complementary to 2SA950 Maximum Ratings (Ta = 25°C) Characteristics Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current Base current Collector power dissipation Junction temperature Storage temperature range Symbol VCBO VCEO VEBO IC IB PC Tj Tstg Rating 35 30 5 800 160 600 150 −55~150 Unit V V V mA mA mW °C °C Electrical Characteristics (Ta = 25°C) Characteristics Symbol Test Condition Collector cut-off current Emitter cut-off current Collector-emitter breakdown voltage DC current gain Collector-emitter saturation voltage Base-emitter voltage T [ ... ]

C2120 PDF Datasheet Download