kf5n53fs.pdf datasheet:

KF5N53FSSEMICONDUCTORN CHANNEL MOS FIELDTECHNICAL DATAEFFECT TRANSISTORGeneral Description This planar stripe MOSFET has better characteristics, such as fastswitching time, fast reverse recovery time, low on resistance, low gatecharge and excellent avalanche characteristics. It is mainly suitable forelectronic ballast and switching mode power supplies.FEATURES VDSS= 525V, ID= 5.0ADrain-Source ON Resistance : RDS(ON)=1.5 @VGS = 10VQg(typ) = 12nCtrr(typ) = 150ns MAXIMUM RATING (Tc=25)CHARACTERISTIC SYMBOL RATING UNITVDSSDrain-Source Voltage 525 VVGSSGate-Source Voltage V30@TC=25 5.0*IDDrain Current @TC=100 2.9* AIDPPulsed (Note1) 13*Single Pulsed Avalanche EnergyEAS270 mJ(Note 2)Repetitive Avalanche EnergyEAR8.6 mJ(Note 1)Peak Diode Recovery dv/dtdv/dt 20 V/ns(Note 3)37.9 WTc=25Drain