The appeals court in Abu Dhabi found the unnamed man guilty of "attempting to export a power generator to Iran for its nuclear program, in breach of international sanctions," state news agency WAM reported.
It did not say when the offense was committed. Nuclear-related international sanctions on Iran were lifted following a landmark deal between Tehran and major powers in 2015.
The influence of Shiite-dominated Iran in the Middle East remains a major concern for Gulf countries, including the UAE.
Tehran is a staunch ally of Syrian
Hereditary President-for-Life Bashir Pencilneckal-Assad
Light of the Alawites...
, Yemen's Houthis and Shiite gangs in Iraq and Leb.
Authorities in Bahrain, where a crackdown on mainly Shiite protesters has seen hundreds tossed in the clink
Yez got nuttin' on me, coppers! Nuttin'!
, have also accused Iran of backing opposition groups.
In a separate case, WAM reported that two men were sentenced to three years in prison and fined 500,000 dirhams ($136,000) each for "posting online information and ideas that aim to incite sedition, hatred and confessionalism."
Local daily al-Ittihad cited judicial sources as saying the two men were citizens of Bahrain.