This part is a kind of semiconductor called C5353.
Function of this product has 2SC5353.
Manufacturers : Toshiba
Image and pinout :
Some of the text within the PDF file :
2SC5353 TOSHIBA Transistor Silicon NPN Triple Diffused Type (PCT process) 2SC5353 Switching Regulator and High Voltage Switching Applications High-Speed DC-DC Converter Applications Unit: mm • • Excellent switching times: tr = 0.7 μs (max), tf = 0.5 μs (max) High collectors breakdown voltage: VCEO = 800 V Absolute Maximum Ratings (Tc = 25°C) Characteristics Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current Base current Collector power dissipation Junction temperature Storage temperature range Ta = 25°C Tc = 25°C DC Pulse Symbol VCBO VCEO VEBO IC ICP IB PC Tj Tstg Rating 900 800 7 3 5 1 2.0 25 150 www.DataSheet.co.kr Unit V V V A A W °C °C JEDEC JEITA TOSHIBA ― SC-67 2-10R1A −55 to 150 Weight: 1.7 g (typ.) Note: Using continuous [ ... ]