An electrical device has a casing, a solid state component, and a pair of means in the casing for electrical contacting and positioning engagement with the solid state component. A pair of terminal means are disposed in the casing for connection in circuit with the engagement means, respectively, and at least one of the terminal means is adapted for limited displacement movement in the casing upon the mounting association of the terminal means with a pair of mating terminals. The at least one terminal means includes means associated both mechanically and electrically with one of the engagement means and adapted for isolating the one engagement means from the limited displacement movement of the at least one terminal means upon the mounting association of the terminal means with the mating terminals.A method of making an electrical device is also disclosed.