This part is a kind of semiconductor called 5H0265RC.

Function of this product has Power Switch.

Manufacturers : Fairchild Semiconductor

Image and pinout :

Some of the text within the PDF file :

www.fairchildsemi.com KA5x02xx-SERIES KA5H0265RC, KA5M0265R, KA5L0265R, KA5H02659RN/KA5M02659RN, KA5H0280R, KA5M0280R Fairchild Power Switch(FPS) Features www.DataSheet4•U.Pcroemcision Fixed Operating Frequency (100/67/50kHz) • Low Start-up Current (Typ. 100uA) • Pulse by Pulse Current Limiting • Over Load Protection • Over Voltage Protection (Min. 25V) • Internal Thermal Shutdown Function • Under Voltage Lockout • Internal High Voltage Sense FET • Auto-Restart Mode Description The Fairchild Power Switch(FPS) product family is specially designed for an off-line SMPS with minimal external components. The Fairchild Power Switch(FPS) consist of high voltage power SenseFET and current mode PWM IC. Included PWM controller features integrated fixed oscillator, under voltag [ ... ]

5H0265RC PDF Datasheet Download