Travel adapter from South Korea to Vietnam
No Adapter Needed
You will not need a plug adapter — South Korea and Vietnam share at least one common plug shape (Type C). The mains frequency is also different (60 Hz vs 50 Hz). This rarely matters for electronics but can affect motor-driven devices like clocks and shavers.
South Korea (home)
✓
Type C
Two round pins (Europlug)
Type F
Two round pins + side earth contacts
Vietnam (destination)
Electrical specs
South Korea
230 V
60 Hz
= Match
Vietnam
230 V
50 Hz
〜 Frequency differs (60 Hz vs 50 Hz). Rarely an issue for most electronics, but can affect motor-driven devices like clocks and shavers.
More about plugs in Vietnam
In Vietnam, the standard power plug is Type A and Type B and Type C. The country runs on 230 volts at 50 Hz. That means wall sockets in Vietnam can be one of 3 different shapes — Type A, Type B, Type C, and your plug needs to physically match the socket to fit.