This part is a kind of semiconductor called 2SK3603-01MR.

Function of this product has N-CHANNEL SILICON POWER MOSFET.

Manufacturers : Fuji Electric

Image and pinout :

Some of the text within the PDF file :

2SK3603-01MR FUJI POWER MOSFET 200304 Super FAP-G Series Features High speed switching Low on-resistance No secondary breadown Low driving power Avalanche-proof N-CHANNEL SILICON POWER MOSFET Outline Drawings (mm) TO-220F Applications Switching regulators UPS (Uninterruptible Power Supply) DC-DC converters Maximum ratings and characteristicAbsolute maximum ratings (Tc=25°C unless otherwise specified) Item Drain-source voltage Continuous drain current Pulsed drain current Gate-source voltage Non-repetitive Avalanche current Maximum Avalanche Energy Maximum Drain-Source dV/dt Peak Diode Recovery dV/dt Max. power dissipation Operating and storage temperature range Isolation voltage Symbol V DS VDSX *5 ID ID(puls] VGS IAS *2 EAS *1 dVDS/dt *4 dV/dt *3 PD Ta=25°C Tc=25°C Tch Tstg VISO Ra [ ... ]

2SK3603-01MR PDF Datasheet Download