Travel adapter from South Korea to Tonga
Adapter Required
Yes — coming from South Korea, you will need a travel adapter for Tonga. South Korea uses Type C/Type F plugs, and Tonga uses Type I, so the pin shapes will not fit any wall socket. 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
Tonga (destination)
Electrical specs
South Korea
230 V
60 Hz
= Match
Tonga
240 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 Tonga
In Tonga, the standard power plug is Type I. The country runs on 240 volts at 50 Hz. That means every wall socket in Tonga is the same shape — Type I, and your plug needs to physically match the socket to fit.