Lim Yong Nam is indicted for allegedly sending thousands of radio parts to Iran in violation of a trade ban.
The parts were allegedly sent from there to Shia militias in Iraq.
Mr Lim, also known as Steven Lim, had been detained in Indonesia for the last 18 months. He was indicted in 2010 for smuggling and making false statements.
He has pleaded not guilty to the charges in a Washington court.