The DR Class E 42 is a class of electric locomotives formerly operated by the Deutsche Reichsbahn in East Germany. They were later operated by Deutsche Bahn, designated as Class 142.
The locomotives have a Bo-Bo axle arrangement and a power output of .
A total of 292 locomotives were built. From 1970 onward, they were designated as Class 242. Some locomotives were acquired by Lokoop and hired out for services in Switzerland.