This part is a kind of semiconductor called 2SD1980.

Function of this product has Power Transistor.

Manufacturers : Rohm

Image and pinout :

Some of the text within the PDF file :

Power Transistor (100V, 2A) 2SD1980 Features 1) Darlington connection for high DC current gain. 2) Built-in resistor between base and emitter. 3) Built-in damper diode. 4) Complements the 2SB1316. inner circuit C B R1 R2 E R1 3.5kΩ R2 300Ω B : Base C : Collector E : Emitter Absolute maximum ratings (Ta=25°C) Parameter Symbol Limits Collector-base voltage VCBO 100 Collector-emitter voltage VCEO 100 Emitter-base voltage VEBO 6 Collector current Collector power dissipation IC PC 2 3 ∗1 1 10 Junction temperature Tj 150 Storage temperature ∗1 Single pulse Pw=100ms Tstg −55 to +150 Unit V V V A(DC) A(Pulse) W W(Tc=25°C) °C °C Packaging specifications and hFE Type 2SD1980 Package CPT3 hFE 1k to 10k Marking − Code TL Basic ordering u [ ... ]

2SD1980 PDF Datasheet Download