Compatibility summary
Your Brazil plug may fit in Vietnam outlets, as both use at least one common plug type. Voltage differs by more than 20% — a voltage converter may be needed for some appliances.
Plug comparison
Brazil plug types: C N
Vietnam plug types: A C F
Both countries share at least one plug type (C N and A C F), so some plugs may work without an adapter. Check your appliance.
Voltage comparison
Brazil: 127V, 60Hz
Vietnam: 220V, 50Hz
Voltage converter recommended (Brazil 127V vs Vietnam 220V).