A DIN rail is a bracket of a standard type widely used for convenient mounting of circuit breakers and industrial control devices inside equipment racks and control panel enclosures. The term 'DIN' is derived from the original specifications published by Deutsches Institut für Normung (DIN) in Germany. Aluminum, copper, steel, plastic, and stainless steel DIN rails come in slotted or unslotted, top hat (O), C, and G section profiles.