The utility model discloses a direct-current
solid-state
relay which comprises a mounting plate, a
relay shell is arranged on the upper end face of the mounting plate, a protective cover plate is arranged at the upper end of the
relay shell, and two friction rotating shafts are symmetrically arranged on the two sides of the outer wall of the protective cover plate. The upper end of the mounting plate is provided with dismounting assemblies located on two sides of the relay shell, each dismounting
assembly comprises two positioning seats, a fixing plate and guide plates, the two positioning seats are internally provided with the guide plates, and the relay shell is internally provided with two mounting grooves; the number of the fixing plates is two, the two fixing plates are fixedly installed in the installation groove, the upper end face of the relay shell is provided with an
insertion groove, the four corners of the bottom of the protective cover plate are fixedly provided with
insertion rods, and one ends of the
insertion rods are connected to the insertion groove. The direct-current
solid-state relay can be quickly disassembled and assembled, the installation tightness is improved, the relay is effectively protected, and the service life of the relay is prolonged.