Solenoid was a droid who served the Techno Union, a leading technology concern that was allied with the Confederacy of Independent Systems during the Clone Wars. In about 21 BBY, a Separatist corvette that Solenoid had been assigned to was attacked in the Ando system by a Galactic Republic task force. The ship was crippled in the engagement and was subsequently boarded by a team of Republic-allied freelance agents. Solenoid and the Thaereian military envoy Gura Tran attacked the agents in a corridor, planning to kill the boarders and steal the agents' starship. However, despite their efforts, Solenoid and Tran were eventually defeated by the agents.