Solid state switching device

Solid state switching device including: a pair of line terminals including first and second line terminals for electrical connection with a corresponding phase conductor of an electric line; a switching assembly including one or more solid state power switches, the switching assembly having a first and second power terminals electrically connected with the first and second lines terminals, respectively; a heat sink element in thermal coupling with the switching assembly to adsorb heat from the switching assembly; an additional heat extraction arrangement to extract heat from the switching assembly and convey at least a portion of the adsorbed heat along the phase conductor through the first and second line terminals.