Alstom Metropolis C851E (Circle Line)

Alstom Metropolis C851E (CCL)
Alstom Metropolis C851E (CCL) train at SRTC
In service ~2026
Manufacturer Alstom
Constructed Barcelona, Spain
Number built 69 Vehicles (23 trainsets)
Formation 3 cars per trainset
Fleet number TBA
Operators SMRT Trains
Depot(s) Kim Chuan
Line(s) served Circle Line
Technical Data
Car body TBA
Doors 8 per car
Electrification 750 V DC third rail
Track gauge Standard Gauge (1435mm)

The Alstom Metropolis C851E trains are the third generation of rolling stock for the Circle Line (CCL).

23 trains (three cars each) were procured, and they are expected to enter service in tandem with the 4.3km Circle Line Stage 6, projected to open in 2026.

The Land Transport Authority (LTA)’s Contract 851E for the procurement of 17 additional electric multiple unit (EMU) trains for the North East Line and Circle Line was awarded to Alstom Transport for ~S$250 million in April 2018.

The new trains are the third-generation rolling stock for both the NEL and CCL, which will supplement previous generations of Alstom Metropolis rolling stock. They were procured ahead of the opening of the North East Line extension (1.7km, projected 2023) and the Circle Line Stage 6 (4.3km, projected 2026).

These trains are manufactured and assembled in Alstom’s manufacturing facility in Barcelona, Spain and progressively shipped to Singapore from 2022 (delayed from 2021 as announced initially) for CCL. Thereafter, trains would undergo testing and commissioning before they are put into service when the extensions open.

On 25 July 2019, LTA announced that they would be purchasing 12 new trains from Alstom, in addition to the 11 trains that were procured in April 2018 for Circle Line Stage 6.


Main Article: Alstom Metropolis – Contract 851E trains | Land Transport Guru

Contract 851E was initially offered solely for 11 Circle Line trains in March 2017. 6 more NEL trains were added under modified contract terms, and awarded to Alstom Transport in April 2018 as the sole bidder. In July 2019, 12 more CCL trains were added to the order, for a combined total of 23 CCL trains.

Train Line Quantity Formation Electrification Signalling
Alstom Metropolis C851E (NEL) North East Line 6 trains (36 cars) DT–Mp–Mi–Mi–Mp–DT 1500 V DC overhead catenary Alstom Urbalis 300 CBTC
Alstom Metropolis C851E (CCL) Circle Line 23 trains (69 cars) Mc1–Tc–Mc2 750 V DC third rail Alstom Urbalis 300 CBTC

For the Circle Line, the 23 new trains will supplement the existing Alstom Metropolis C830 and Alstom Metropolis C830C trains when the 4.3km-long Circle Line Stage 6 from HarbourFront to Marina Bay opens in 2026.

Each 3-car train (Formation: Mc1–Tc–Mc2) comprises two Motor Cars (Mc1 and Mc2) at each end, and an unpowered Trailer Car (Tc) in the middle.

The trains are manufactured and assembled in Alstom’s manufacturing facility in Santa Perpetua de Mogoda (near Barcelona, Spain), and progressively shipped to Singapore from 2022. Thereafter, trains would undergo testing and commissioning before they are put into service when the extensions open.

With the new trains, the existing NEL fleet was expanded by 14% from 43 to 49 trains and the existing CCL fleet increased by 36% from 64 to 87 trains (inclusive of subsequent orders for additional CCL C851E trains). While being awarded under the same contract, trains built for the NEL and CCL differ in technical specifications owing to different electrification used on both lines.


To enable a more robust maintenance regime, all the new trains are equipped with condition monitoring systems to gather data from equipment on the trains. This enables continuous monitoring of the health of the equipment and allows the operator to carry out predictive maintenance for the trains. Current collector shoe sensors on the new CCL trains enables the operator to react promptly and take necessary measures if any dislodgement is detected.

In addition, two of the new CCL three-car trains are each fitted with an Automatic Track Inspection (ATI) System, which enables monitoring of the running rails, track equipment and sleepers while the trains are in operation. The ATI System supplements existing track inspection activities for timely and more effective identification of rail and trackside components which require maintenance.



Main Article: 3rd Gen Circle Line C851E trains arrive in Singapore!

The first train was delivered to Kim Chuan Depot on 11 March 2022.


Phase 1 of the Singapore Rail Test Centre (SRTC) was completed on 2 November 2023, where the first two C851E (CCL) trains underwent testing and commissioning works.

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