View stp2na50 datasheet:

STP2NA50 STP2NA50FI N - CHANNEL ENHANCEMENT MODE POWER MOS TRANSISTOR PRELIMINARY DATA TYPE VDSS RDS(on) ID STP2NA50 500 V < 4 ? 2.8 A STP2NA50FI 500 V < 4 ? 2 A TYPICAL R = 3.25 ? DS(on) ± 30V GATE TO SOURCE VOLTAGE RATING 100% AVALANCHE TESTED REPETITIVE AVALANCHE DATA AT 100oC 3 3 LOW INTRINSIC CAPACITANCES 2 2 1 1 GATE CHARGE MINIMIZED REDUCED THRESHOLD VOLTAGE SPREAD TO-220 ISOWATT220 APPLICATIONS MEDIUM CURRENT, HIGH SPEED SWITCHING SWITCH MODE POWER SUPPLIES (SMPS) CONSUMER AND INDUSTRIAL LIGHTING INTERNAL SCHEMATIC DIAGRAM ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit STP2NA50 STP2NA50FI VDS Drain-Source Voltage (Vgs = 0) 500 V VDGR Drain-Gate Voltage (Rgs = 20 K?) 500 V VGS Gate-Source Voltage ± 30 V I Drain-Current (continuous)