This part is a kind of semiconductor called 3DD13009.
Function of this product has NPN Transistor.
Manufacturers : LGE
Image and pinout :
Some of the text within the PDF file :
3DD13009(NPN) TO-220 Transistor 1. BASE TO-220 2. COLLECTOR Features 3 2 1 power switching applications 3. EMITTER MAXIMUM RATINGS (TA=25℃ unless otherwise noted) Symbol VCBO VCEO VEBO IC PC TJ Tstg Parameter Collector-Base Voltage Collector-Emitter Voltage Emitter-Base Voltage Collector Current -Continuous Collector Power Dissipation Junction Temperature Storage Temperature Value 700 400 9 12 2 150 -55-150 Units V V V A W ℃ ℃ Dimensions in inches and (millimeters) ELECTRICAL CHARACTERISTICS (Tamb=25℃ unless otherwise specified) Parameter Collector-base breakdown voltage Collector-emitter breakdown voltage Emitter-base breakdown voltage Collector cut-off current Collector cut-off current Emitter cut-off current DC current gain Collector-emitter saturation voltage [ ... ]