View 18n20a datasheet:

GOFORD18N20ADescription Features VDSS RDS(ON) ID @10V (typ) 0.136 18A200V Fast switching TO-251TO-252 100% avalanche tested Improved dv/dt capability Application DC-DC & DC-AC Converters for telecom, industrial and consumer environment Uninterruptible Power Supply (UPS) Switch Mode Low Power Supplies Industrial Actuators TO-220Absolute Maximum Ratings TC=25 unless otherwise specified Max. Symbol Parameter Units TO-220 TO-251 TO-252 V Drain-Source Voltage 200 V DSSV Gate-Source Voltage 30 V GSSTC = 25 18 18* 18* A I Continuous Drain Current DT = 100 11.45 11.45* 11.45* A C I Pulsed Drain Current note1 72 72* 72* A DMEAS Single Pulsed Avalanche Energy note2 320 mJ dv/dt Peak Diode Recovery Energy note3 8 V/ns Power Dissipation TC = 25 110 65.8 65.8 W P DL

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