EMP-grenade

EMP-grenades are non-lethal weapons resembling small silver spheres. When used, they open and unleash an electromagnetic pulse which disables any Transformers in the immediate vicinity.

Fiction

Web of Deception

Lockdown used an EMP-grenade on Bumblebee, Prowl and Bulkhead when the three Autobots broke into his ship while it was parked on the bottom of Lake Erie. Web of Deception

War for Cybertron

During the Great War, EMP Grenades were utilized by Scout Class warriors, and were used to disable sensors. When affected by the blast, a Transformer could still move around and use his weaponry, but their sensors and heads up display would be scrambled.