This part is a kind of semiconductor called 2SD1980.

Function of this product has Silicon NPN Power Transistor.

Manufacturers : Inchange Semiconductor

Image and pinout :

Some of the text within the PDF file :

isc Silicon NPN Power Transistor INCHANGE Semiconductor 2SD1980 DESCRIPTION ·Darlington connection for high DC current gain ·Built in resistor between base and emitter ·Built in damper diode ·Complementary PNP types:2SB1316 ·100% avalanche tested ·Minimum Lot-to-Lot variations for robust device performance and reliable operation APPLICATIONS ·Motor drivers,LED driver,Power supply ABSOLUTE MAXIMUM RATINGS(Ta=25℃) SYMBOL PARAMETER VALUE UNIT VCBO Collector-Base Voltage 100 V VCEO Collector-Emitter Voltage 100 V VEBO Emitter-Base Voltage 6V IC Collector Current-Continuous 2.0 A ICM Collector Current-Peak PC Collector Power Dissipation @ TC=25℃ TJ Junction Temperature 3.0 A 10 W 150 ℃ Tstg Storage Temperature Range -55~150 ℃ isc website：www.iscsemi.c [ ... ]

2SD1980 PDF Datasheet Download