View stp5n30 datasheet:

STP5N30 STP5N30FI N - CHANNEL ENHANCEMENT MODE POWER MOS TRANSISTOR TYPE VDSS RDS(on) ID STP5N30 300 V < 1.4 ? 5 A STP5N30FI 300 V < 1.4 ? 3.5 A TYPICAL R = 1.2 ? DS(on) AVALANCHE RUGGED TECHNOLOGY 100% AVALANCHE TESTED REPETITIVE AVALANCHE DATA AT 100oC 3 3 APPLICATION ORIENTED 2 2 1 1 CHARACTERIZATION APPLICATIONS TO-220 ISOWATT220 HIGH SPEED SWITCHING SWITCH MODE POWER SUPPLIES (SMPS) CHOPPER REGULATORS, CONVERTERS, MOTOR CONTROL, LIGHTING FOR INDUSTRIAL AND CONSUMER ENVIRONMENT INTERNAL SCHEMATIC DIAGRAM PARTICULARLY SUITABLE FOR ELECTRONIC FLUORESCENT LAMP BALLASTS ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit STP5N30 STP5N30FI VDS Drain-source Voltage (VGS = 0) 300 V VDGR Drain- gate Voltage (RGS = 20 k?)300 V VGS Gate-source Volt