The table below summarises the plug types, voltage and frequency of electrical current in both Tajikistan and Iran.
|Plug Types||C, I||C|
|Frequency of electrical current||50Hz||50Hz|
In Tajikistan there's more than one plug type in use.
What type of plug does your appliance have?
No adaptor needed
Iran uses Socket Type C, which is the same as the plug type of your appliances from Tajikistan. You will not need an adaptor.
You will need this adaptor:
Socket Type I
(Tajikistan) to Plug Type C
The voltages found in Tajikistan (220V) and Iran (230V) are not exactly the same, but the difference is tolerable, so you should not need a transformer.
The frequency found in Tajikistan and Iran is exactly the same (50Hz). Timing devices and appliances that use motors will function as expected under this frequency.