Synchronous rectifier

The utility model discloses a synchronous rectifier, which comprises a protective shell, an installation bottom plate is movably arranged below the protective shell, two sides of the installation bottom plate are respectively provided with a limiting plug-in groove, two assembly plates are symmetrically distributed on the bottom surface of the protective shell, linkage sliding blocks are arranged between the assembly plates and the protective shell, and the linkage sliding blocks are connected with the limiting plug-in grooves. A linkage rod is arranged on the end face of the small end of the linkage sliding block, a limiting inserting block is arranged at the other end of the linkage rod, a reset spring is arranged between the linkage rod and the assembling plate, the outer end of the limiting inserting block is inserted into the inner side of the limiting inserting groove, and an extrusion rod is movably arranged below the linkage sliding block. And the extrusion rod penetrates through the assembly plate. A