This part is a kind of semiconductor called D2061.

Function of this product has 2SD2061.

Manufacturers : Jiangsu Changjiang Electronics

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Some of the text within the PDF file :

JIANGSU CHANGJIANG ELECTRONICS TECHNOLOGY CO., LTD TO-220F Plastic-Encapsulate Transistors 2SD2061 TRANSISTOR (NPN) TO-220F 1. BASE FEATURES z Low saturation voltage z Excellent DC current gain characteristice 2. COLLECTOR 3. EMITTER MAXIMUM RATINGS (TA=25℃ unless otherwise noted) Symbol VCBO VCEO VEBO IC PC Paramenter Collector-Base Voltage Collector-Emitter Voltage Emitter-Base Voltage Collector Current -Continuous Collector Power Dissipation Junction Temperature Storage Temperature Range Value 80 60 5 3 2 150 -55-150 Units V V V A W ℃ ℃ Tj Tstg ELECTRICAL CHARACTERISTICS (Tamb=25℃ unless Parameter Collector-base breakdown voltage Collector-emitter breakdown voltage Emitter-base breakdown voltage Collector cut-off current Emitter cut-off current DC [ ... ]

D2061 PDF Datasheet Download