View stn1n20 datasheet:

STN1N20 ® N - CHANNEL 200V - 1.2 ? - 1A - SOT-223 POWER MOS TRANSISTOR PRELIMINARY DATA TYPE VDSS RDS(on) ID CONT STN1N20 200 V < 1.5 ? 1 A TYPICAL R = 1.2 ? DS(on) AVALANCHE RUGGED TECHNOLOGY SOT-223 CAN BE WAVE OR REFLOW SOLDERED 2 AVAILABLE IN TAPE AND REEL ON REQUEST 3 150 oC OPERATING TEMPERATURE 2 1 APPLICATION ORIENTED CHARACTERIZATION SOT-223 APPLICATIONS HARD DISK DRIVERS SMALL MOTOR CURRENT SENSE CIRCUITS INTERNAL SCHEMATIC DIAGRAM DC-DC CONVERTERS AND POWER SUPPLIES ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit VDS Drain-source Voltage (VGS = 0) 200 V VDGR Drain- gate Voltage (RGS = 20 k?)200 V VGS Gate-source Voltage ± 20 V ID(*) Drain Current (continuous) at Tc = 25 oC1 A ID(*) Drain Current (continuous) at Tc = 100 oC0.6