View 2sk2749 datasheet:

2SK2749 TOSHIBA Field Effect Transistor Silicon N Channel MOS Type (?-MOSIII) 2SK2749 Chopper Regulator, DC-DC Converter and Motor Drive Applications Unit: mm Low drain-source ON resistance : RDS = 1.6 ? (typ.) (ON) High forward transfer admittance : |Y | = 5.0 S (typ.) fs Low leakage current : I = 100 µA (max) (V = 720 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 900 V Drain-gate voltage (RGS = 20 k?) VDGR 900 V Gate-source voltage VGSS ±30 V DC (Note 1) ID 7 Drain current A Pulse (Note 1) IDP 21 1. GATE Drain power dissipation (Tc = 25°C) PD 150 W 2. DRAIN (HEAT SINK) 3. SOURCE Single pulse avalanche energy EAS 682 mJ (N