N channel to 220 power mosfets vishay irf840 hexfet power mosfet n channel type 500v drain source breakdown voltage 085r drain source on resistance 8a drain current 20v gate source voltage 14ns turn on time 49ns turn off time 125w power to 220ab case dynamic dvdt rating repetitive avalanche rated fast switching ease of paralleling simple drive requirements vishay irf840 mosfet n 500v 8a