The invention relates to an electrical fuse for rotary current generators comprising a bridge rectifier assembly (14), said generator supplying a direct current network, in particular in motor vehicles. In order to produce a simple, reliable, cost-effective fuse which responds rapidly during an overload, a fuse element (21) is positioned in the line branch which guides the entire generator current, between the bridge rectifier assembly (14) and a direct-current connecting terminal (22) of the generator.