This part is a kind of semiconductor called C5909.

Function of this product has 2SC5909.

Manufacturers : Panasonic

Image and pinout :

Some of the text within the PDF file :

Power Transistors 2SC5909 Silicon NPN triple diffusion mesa type For horizontal deflection output 15.5±0.5 (10.0) Unit: mm φ 3.2±0.1 5˚ (4.5) 3.0±0.3 5˚ ■ Features (2.0) • High breakdown voltage: VCBO ≥ 1 500 V • High-speed switching: tf < 200 ns • Wide safe operation area 26.5±0.5 (23.4) 5˚ (4.0) 2.0±0.2 1.1±0.1 0.7±0.1 5.45±0.3 10.9±0.5 5.5±0.3 5˚ 5˚ ■ Absolute Maximum Ratings TC = 25°C Parameter Collector-base voltage (Emitter open) Collector-emitter voltage (E-B short) Collector-emitter voltage (Base open) Emitter-base voltage (Collector open) Base current Collector current Peak collector current * Symbol VCBO VCES VCEO VEBO IB IC ICP PC Tj Tstg Ta = 25°C Rating 1 500 1 500 600 7 5 15 25 50 3 150 −55 to +150 Unit V V V [ ... ]

C5909 PDF Datasheet Download