Hello Everyone, So I have one thing that is bugging me about MOSFETs. So I have used them on numerous projects and mainly as a through hole component. I finally have my toaster oven setup and supplies to transition to the surface mount world as a hobbyist (I have done self etching but just upgrading now for smaller boards). For NMOS, Why is the drain pad so large and the source still a pin and how are they able to conduct the same? I know that there is an on resistance so there is a little voltage drop but for the most part the conduction path has to be the same for the drain and the source. So what is going on inside?