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 Thalys electric 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. The locomotives had an aluminum body with dark blue accents.