N channel to 220 power mosfets vishay irf640npbf hexfet power mosfet n channel type 200v drain source breakdown voltage 018r drain source on resistance 18a drain current 20v gate source voltage 14ns turn on time 45ns turn off time 125w power to 220ab case dynamic dvdt rating repetitive avalanche rated fast switching ease of paralleling simple drive requirements vishay irf640npbff ir640 mosfet n 200v 18a