The 3C-series utility droid was a series of utility droid manufactured by Duwani Mechanical Products prior to the Dark Wars and in use at the same time as the T3-series utility droid. In the final year of the Dark Wars, one 3C-series unit, 3C-FD, helped utility droid T3-M4 repair the starship Ebon Hawk on Peragus but was later destroyed by an HK-50 series assassin droid.