The Alstom Metropolis C751A is the first generation of communications-based train control (CBTC) electric multiple unit rolling stock in operation on the North East line (NEL) of Singapore's Mass Rapid Transit (MRT) system since 2003.

In February 1997, the Land Transport Authority (LTA) of Singapore shortlisted several rolling stock companies for the bidding of the trains.

In January 1998, GEC Alsthom (now known as Alstom) secured a contract to supply rolling stock for the NEL.

[8] For Alstom, it uses the URBALIS 300 moving-block communications-based (CBTC) Automatic Train Control (ATC) system, which optimizes headway and enables extra trains to be injected automatically into the system at rush hour to increase passenger capacity and reduce congestion.

Communication between the train and the fixed signaling equipment is enabled by the IAGO two-way continuous transmission system.

[9] However, a new LTA LCD Dynamic Route Map Display (DRMD) located above each door will be retrofitted.

Smaller SBS Transit logos are located on the gangway ends of each car in a similar fashion to LTA's earlier corporate livery designs.

A complete six-car trainset consists of an identical twin set of one driving trailer (DT) and two motor cars (Mi & Mp) permanently coupled together.