This part is a kind of semiconductor called D2579.

Function of this product has 2SD2579.

Manufacturers : Sanyo Semiconductor Corporation

Image and pinout :

Some of the text within the PDF file :

Ordering number:5795 NPN Triple Diffused Planar Silicon Transistor 2SD2579 Color TV Horizontal Deflection Output Applications Features · High speed. · High breakdown voltage (VCBO=1500V). · High reliability (Adoption of HVP process). · Adoption of MBIT process. Package Dimensions unit:mm 2039D [2SD2579] 3.4 16.0 5.6 3.1 5.0 8.0 21.0 22.0 2.8 2.0 4.0 2.0 20.4 1.0 0.6 1 2 3 2.0 1:Base 2:Collector 3:Emitter SANYO:TO3PML 5.45 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 Conditions Ratings 1500 800 6 8 20 3.0 Unit V V V A [ ... ]

D2579 PDF Datasheet Download