If you are building system level electronic products that use AC-DC power supplies to ship worldwide....consider using a universal power supply 85-265VAC with multiple outputs in order to save on inventory, BOM, RMA and service costs. Better to carry just one supply in the dimensions that fits more of your products then to carry multiple VAC input supplies fitting for countries requiring certain ranges. Consider using universals that are high efficiency and have very low standby wattage available...preferably a fraction of total watt output and where there is no overheating.
Using such supplies will also mean you can use universal power entry input modules that include a end-user switch for a specific country VAC requirement. These modules include fuses for each setting. You'll carry less specific input modules since you are using universal power supplies.
