Mosfets gate, transistor switch, Power MosFet, High voltage transistor,

 N-Channel 20 V 1 A 0.45 Ω Surface Mount Enhancement Mode Power MosFet - SOT-323

https://www.futureelectronics.com/p/semiconductors--discretes--transistors--mosfets/dmg1012uw-7-diodes-incorporated-6129534