Electrical device with a Umhüllmasse

It will at least partially surrounds an electrical device (10) to an electrical component (12), which having a cement mass (22) Umhullmasse (20) is presented. The Umhullmasse (20) in this case further comprises a first material comprising particles (24a, 24b) and a second material having fibers (26), wherein the first material and the second material has a higher thermal conductivity than the cement, the cement mass (22).