This part is a kind of semiconductor called C5043.

Function of this product has 2SC5043.

Manufacturers : Sanyo Semicon Device

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Some of the text within the PDF file :

Ordering number:EN4781 NPN Triple Diffused Planar Silicon Transistor 2SC5043 Ultrahigh-Definition CRT Display Horizontal Deflection Output Applications Features · High speed (tf=100ns typ). · High reliability (HVP process). · High breakdown voltage (VCBO=1600V). · Adoption of MBIT process. · On-chip damper diode. Package Dimensions unit:mm 2039D [2SC5043] 3.4 16.0 5.0 8.0 5.6 3.1 21.0 22.0 4.0 2.8 2.0 20.4 1.0 2.0 0.6 1 2 3 3.5 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 Tc=25˚C 5.45 5.45 1 : Base 2 : Collector 3 : Emitter SANYO : TO- [ ... ]

C5043 PDF Datasheet Download