DIN RAIL MCB CHANNEL / MCB CHANNEL PATTI A DIN rail channel is a standard type of bracket, often made of steel, used for conveniently mounting electrical components like circuit breakers, terminal blocks, and other industrial control devices within equipment racks or control panels. The DIN rail is the actual mounting platform for electrical components, while the DIN channel is used to provide mechanical support and secure the DIN rail to a surface such as a wall or a panel. DIN rails are the metal rails inside an electrical enclosure that are used to mount circuit breakers and other types of electrical equipment. Although DIN rails have a relatively simple design, they're extremely important for the installation, maintenance and operation of electrical equipment.