This part is a kind of semiconductor called 2SK1486.
Function of this product has N-CHANNEL MOS TYPE TRANSISTOR.
Manufacturers : Toshiba Semiconductor
Image and pinout :
Some of the text within the PDF file :
2SK1486 TOSHIBA Field Effect Transistor Silicon N Channel MOS Type (π−MOSIII.5) 2SK1486 Chopper Regulator, DC−DC Converter and Motor Drive Applications Unit: mm z Low drain−source ON resistance : RDS (ON) = 0.08 Ω (typ.) z High forward transfer admittance : |Yfs| = 14 S (typ.) z Low leakage current : IDSS = 300 μA (max) (VDS = 300 V) z Enhancement mode : Vth = 2.0 to 4.0 V (VDS = 10 V, ID = 1 mA) Absolute Maximum Ratings (Ta = 25°C) Characteristics Symbol Rating Unit Drain−source voltage Drain−gate voltage (RGS = 20 kΩ) Gate−source voltage Drain current DC (Note 1) Pulse (Note 1) Drain power dissipation (Tc = 25°C) Channel temperature Storage temperature range VDSS VDGR VGSS ID IDP PD Tch Tstg 300 300 ±30 32 128 200 150 −55 to 150 V V V A W °C [ ... ]