You Do Need power plug adapter while traveling from San Marino to Thailand.

Here is Why You Need An Adapter

The outlet and plug type used in Thailand are A, B, C and O and in San Marino are C, F and L. This is how they look like.

San Marino

In San Marino, outlets of type C, F and L are in use.

Type C

Type F

Type L

Thailand

In Thailand, outlets of type A, B, C and O are in use.

Type A

Type B

Type C

Type O