The rail-mounted dual power conversion isolation switch has four functions on, off, conversion, and isolation. It can be freely switched on and off between two loads carried by a group of lines, or on two power sources. It is used for on-off and switching between, using DIN standard rail (35×7.5) installation, the shell is made of PA66 injection molding, with high flame-retardant performance, it is an ideal product that needs to be used for switching and opening and closing in industrial equipment and circuits. The rated current of this product is 40A/63A, and it is convenient and safe to install and wire on the guide rail.