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Metal-Oxide-Semiconductor Field-Effect Transistor, a type of field-effect transistor (FET). MOSFETs have an insulated gate, the voltage of which determines the conductivity of the device. This can be used for amplifying or switching electronic signals. (From: Wikipedia)

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For 3.3V microprocessors, what's the best way to power the gate of a MOSFET?

I've been using the NPN MOSFET AO3400 with a Rds(at Vgs = 2.5V) < 52mΩ with good results. They can be bought cheaply (100 pieces for less than 3 dollars) online from aliexpress or ebay. … There is also the PNP MOSFET AO3401 with Rds(at Vgs =-2.5V) < 85mΩ for high side switching. The AO3401 is also useful for reverse polarity protection. …
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