The electromagnetic plasma cannon was a cannon utilized by the Umbaran Militia on its mobile heavy cannon, hover tank, and Zenuas 33 Umbaran starfighter. They were noted for their power and destructive ability. A notable example of the sheer might of these cannons was when a few clone troopers used them to blast open the blast doors of the supply ship.
- Star Wars: The Clone Wars – "Darkness on Umbara" (First appearance)
- Star Wars: The Clone Wars – "The General"
- Star Wars: The Clone Wars – "Plan of Dissent" (Appears in flashback(s))
- "The Shadow of Umbara"—The Clone Wars: Stories of Light and Dark
- Aftermath: Empire's End (Mentioned only)