This part is a kind of semiconductor called 2SD1651C.
Function of this product has Color TV Horizontal Deflection Output Applications.
Manufacturers : Sanyo Semicon Device
Image and pinout :
Some of the text within the PDF file :
Ordering number : ENN7086 2SD1651C NPN Triple Diffused Planar Silicon Transistor 2SD1651C Color TV Horizontal Deflection Output Applications Features • • • • • Package Dimensions unit : mm 2174A [2SD1651C] 16.0 3.4 5.6 3.1 High speed. High breakdown voltage(VCBO=1500V). High reliability(Adoption of HVP process). Adoption of MBIT process. On-chip damper diode. 5.0 21.0 4.0 22.0 8.0 2.8 2.0 20.4 0.7 0.9 1 2 5.45 3 Specifications Absolute Maximum Ratings at Ta=25°C Parameter Collector-to-Base Voltage Collector-to-Emitter Voltage Emitter-to-Base Voltage Collector Current Collector Current (Pulse) Collector Dissipation Junction Temperature Storage Temperature Symbol VCBO VCEO VEBO IC ICP PC Tj Tstg Tc=25°C Conditions 1 : Base 2 : Collector 3 : Em [ ... ]