What is a mosfet transistor, n-channel mosfet, transistor circuits, Power mosfet

 Dual N-Channel 60 V 2.1 Ohm 0.45 pC 0.65 W Silicon SMT Mosfet - SOT-563

https://www.futureelectronics.com/p/semiconductors--discretes--transistors--mosfets/dmg1026uv-7-diodes-incorporated-5048908