Plasma-density charge

Plasma density charges are Decepticon bombs, planted covertly by facsimile constructs and detonated remotely. They may be used to ignite other, more explosive materials.

Fiction

IDW comics continuity

When a seam of Regenesis ore was discovered beneath a dig site in Eden, Texas, Bludgeon sent Markham and Fleming to plant plasma density charges near a pocket of natural gas close to the main shaft. When the charges detonated the gas the site was evacuated, allowing the Decepticons to move in and take the ore for themselves. Spotlight: Soundwave