The Belgian Railways Class 18 was a type of electric locomotive operated by NMBS/SNCB of Belgium. They have been displaced from these workings by Thalyselectric multiple units and were all retired from service by 1999. 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.[3][4]