help reading a datasheet

lerameur · 2008-08-26T17:22:01+00:00

Hi,I am looking at digikey web site the IRFZ44 TO-220AB, there are manychips available.I am a bit confuse concerning the resistance Vs Watt coloumn.I Will take two randomlythe IRFZ44VZ-ND WITH 12mOhm Rds and 92W power @31 amps 10vandthe IRFZ44R-ND WITH 28mOhm Rds and 150W power @31 amps 10vI guess the more the resistance the more power...?does that mean more power it is able to dissipate.I would suppose I should get the 28mOhm one because there is lessloss because less resistance.. is this the way to think? or doesthese data means something else?Does the IRFZ44VZ handles the current more efficiently?thanksK