South America is mostly 220–230 V at 50 Hz, but plug shapes vary. Argentina, Uruguay and Chile use Type I (the Australian/NZ style); Brazil runs the Type N standard at dual 127/220 V depending on the city; Bolivia, Peru and Colombia use a mix of Type A, B and C; Guyana and Suriname are 110–220 V outliers shared with the Caribbean. Travellers from a 110–120 V country (USA, Canada, much of Central America) need to watch voltage compatibility on heating appliances; modern phone and laptop chargers usually handle the swing automatically. A universal adapter covers most cases.

12 countries in South America

Country	Plug types	Voltage	Hz
Argentina	I	230 V	50
Bolivia	A B C	230 V	50
Brazil	C N	127/220 V	60
Chile	C L	230 V	50
Colombia	A B	110 V	60
Ecuador	A B	120 V	60
Guyana	A B	110/220 V	50/60
Paraguay	A B C N	230 V	50
Peru	A B C	230 V	60
Suriname	A B	110 V	60
Uruguay	C F L	230 V	50
Venezuela	A B	120 V	60