View 2sk2837 datasheet:

2SK2837 TOSHIBA Field Effect Transistor Silicon N Channel MOS Type (?-MOSV) 2SK2837 Chopper Regulator, DC-DC Converter and Motor Drive Applications Unit: mm Low drain-source ON resistance : RDS = 0.21 ? (typ.) (ON) High forward transfer admittance : |Y | = 17 S (typ.) fs Low leakage current : I = 100 µA (max) (V = 500 V) DSS DSS 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 20 A Drain current Pulse (Note 1) IDP 80 A 1. GATE Drain power dissipation (Tc = 25°C) PD 150 W 2. DRAIN (HEAT SINK) 3. SOURCE Single pulse avalanche energy EAS 960 mJ