The invention discloses a relay. The relay comprises a machine shell, a bottom plate and a driving apparatus; static contact groups are arranged on the machine shell; each static contact group comprises two mutually insulated static contacts; the bottom plate comprises a plate body, one or more movable contact groups arranged on the plate body and corresponding to the corresponding static contact groups, and arc extinguishing side plates which are arranged on the plate body and extend upwardly; each movable contact group comprises two movable contacts; and the two movable contacts of at least one movable contact group are positioned on the inner sides of the arc extinguishing side plates and are electrically conducted through a fuse. By virtue of the relay provided by the embodiment of the invention, overload protection and short-circuit protection are realized by the fuse, so that the safety of a circuit system equipped with the relay is improved, and fire disaster and the like caused by overcurrent or short circuit can be avoided.