Please help me in identifying surface mount component
Yes, the D identifier underneaths means its some type of diode.

If it was the same as the 301 one below it then maybe it is this one:

FDV301N,  SOT23  n-ch 'digital' fet 25V 0.22A

https://www.mouser.com/datasheet/2/308/FDV301N-D-1808827.pdf