A switch device includes first and second contacting portions including first and fixed contacting portions and first and second movable contacting portions, respectively, the first fixed contacting portion and the second fixed contacting portion being configured to be electrically connected to one of a power source and an electronic device while the first movable contacting portion and the second movable contacting portion are configured to be electrically connected to the other of the power source and the electronic device; and first and second electric arc voltage suppression units configured to be electrically connected to the first and second fixed contacting portions and the first and second movable contacting portions for suppressing generation of electric arcs there between, respectively.