View 2sk2998 datasheet:

2SK2998 TOSHIBA Field Effect Transistor Silicon N Channel MOS Type (?-MOSV) 2SK2998 Chopper Regulator, DC-DC Converter Applications Unit: mm Low drain-source ON resistance : RDS = 11.5 ? (typ.) (ON) High forward transfer admittance : |Y | = 0.4 S (typ.) fs Low leakage current : I = 100 µA (max) (V = 500 V) DSS DS Enhancement-mode : Vth = 2.0~4.0 V (V = 10 V, I = 1 mA) DS D Maximum Ratings (Ta = 25°C) Characteristics Symbol Rating Unit Drain-source voltage VDSS 500 V Drain-gate voltage (RGS = 20 k?) VDGR 500 V Gate-source voltage VGSS ±30 V DC (Note 1) ID 0.5 A Drain current Pulse (Note 1) IDP 1.5 A Drain power dissipation PD 0.9 W Channel temperature Tch 150 °C Storage temperature range Tstg -55~150 °C Thermal Characteristics JEDEC TO-92MOD C