View stp3na50 datasheet:

STP3NA50 STP3NA50FI N - CHANNEL ENHANCEMENT MODE FAST POWER MOS TRANSISTOR TYPE VDSS RDS(on) ID STP3NA50 500 V < 3 ? 3.3 A STP3NA50FI 500 V < 3 ? 2.3 A TYPICAL R = 2.4 ? 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 GHARGE MINIMIZED REDUCED THRESHOLD VOLTAGE SPREAD TO-220 ISOWATT220 DESCRIPTION This series of POWER MOSFETS represents the most advanced high voltage technology. The optimized cell layout coupled with a new proprietary edge termination concur to give the device low R and gate charge, unequalled DS(on) INTERNAL SCHEMATIC DIAGRAM ruggedness and superior switching performance. APPLICATIONS HIGH CURRENT, HIGH SPEED SWITCHING SWITCH MODE POWER