This part is a kind of semiconductor called 2SK2903-01MR.

Function of this product has N-CHANNEL SILICON POWER MOS-FET.

Manufacturers : Fuji Electric

Image and pinout :

Some of the text within the PDF file :

2SK2903-01MR N-CHANNEL SILICON POWER MOS-FET Features High speed switching Low on-resistance No secondary breadown Low driving power Avalanche-proof FUJI POWER MOS-FET TO-220F15 Applications Switching regulators UPS (Uninterruptible Power Supply) DC-DC converters 2.54 3. Source 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 Maximum Avalanche Energy Max. power dissipation Operating and storage temperature range Symbol V DS ID ID(puls] VGS EAV *1 PD Tch Tstg Rating 60 ±50 ±200 ±30 720.8 50 +150 -55 to +150 Unit Equivalent circuit schematic Drain(D) V A A V mJ W °C °C *1 L=0.384mH, Vcc=24V Gate(G) Source(S) Electrical characteristics (Tc = [ ... ]

2SK2903-01MR PDF Datasheet Download