Mosfet switch, P-Channel Trench MOSET, power mosfet, mosfet uses,

 PMV40UN2 Series 30 V 44 mOhm 3.7 A SMT N-Channel TrenchMOS FET - TO-236AB

https://www.futureelectronics.com/p/semiconductors--discretes--transistors--mosfets/pmv40un2r-nexperia-7057462