Compatibility summary
You will need a travel adapter in Aruba; plug types used there differ from Switzerland. Voltage differs by more than 20% — a voltage converter may be needed for some appliances.
Plug comparison
Switzerland plug types: C J
Aruba plug types: A B
There is no common plug type between Switzerland (C J) and Aruba (A B). You need a travel adapter.
Voltage comparison
Switzerland: 230V, 50Hz
Aruba: 120V, 60Hz
Voltage converter recommended (Switzerland 230V vs Aruba 120V).