Samsung 3903-000115 is an EU CBF power cord for connecting compatible equipment to a mains supply. Its part number identifies this specific cord, making it a useful replacement when the corresponding cable is missing or needs replacing.
The cord is listed at 1.5 m long, providing reach between the equipment and a nearby outlet. Its connector designation is CP3 / IEC 320 C5. The distributor product title also associates it with references AA-PA0N90W/E and AA-RD0NX25/E.
This is a power cord, rather than a power adapter. The listing identifies it as an EU type and specifies the connector and length, so its role is clear for setups using those matching connections.