I was looking for a MOSFET that I could use to control 3.7v 4A dc motors with for a quad copter. I'm very new to electrical stuff, but I read that I could use MOSFETs to control motors. I look online for MOSFETs meeting the specs I listed above, and noticed that the majority of MOSFETs have labels with extremely high currents. For instance https://www.amazon.com/INTERNATIONAL-RECTIFIER-IRLB3034PBF-MOSFET-220AB/dp/B00HKHW9UU/ref=sr_1_13?ie=UTF8&qid=1485926431&sr=8-13&keywords=mosfet says 195A on it, and it seems really small.
Can MOSFETs that small really handle currents that high? Wouldn't they just melt?