View 2sk1120 datasheet:

2SK1120 TOSHIBA Field Effect Transistor Silicon N Channel MOS Type (?-MOSII.5) 2SK1120 DC-DC Converter and Motor Drive Applications Unit: mm Low drain-source ON resistance : RDS (ON) = 1.5 ? (typ.) High forward transfer admittance : |Y | 4.0 S (typ.) fs = Low leakage current : I = 300 µA (max) (V = 800 V) DSS DS Enhancement-mode : Vth = 1.5~3.5 V (V = 10 V, I = 1 mA) DS D Maximum Ratings (Ta = 25°C) Characteristics Symbol Rating Unit Drain-source voltage VDSS 1000 V Drain-gate voltage (RGS = 20 k?) VDGR 1000 V Gate-source voltage VGSS ±20 V DC (Note 1) ID 8 Drain current A Pulse (Note 1) IDP 24 1. GATE Drain power dissipation (Tc = 25°C) PD 150 W 2. DRAIN (HEAT SINK) Channel temperature Tch 150 °C 3. SOURCE Storage temperature range Tstg