The Belgian Railways Class 18 was a type of electric locomotive operated by NMBS/SNCB of Belgium. Six locomotives of this type entered service between 1973 and 1974. They were derived from the French SNCF CC 40100 express passenger locomotives. Their multi-voltage capabilities allowed them to work beyond Belgium's borders, mainly Paris - Brussels/Liège and Oostende - Cologne. The locomotives were all retired from service by 1999. Class 18 has been displaced from these assignments by Thalys electric multiple units.