SNCF Class Z 20900

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Z 20900
A Z 20900 trainset operating on the RER C line at Neuilly – Porte Maillot station
In service	2001–present
Manufacturer	Alstom and Bombardier[1]
Family name	Z 2N series, X'Trapolis Tagus
Replaced	Z5300
Constructed	2001–2004
Entered service	12 June 2001
Refurbished	2019–2023
Number in service	54 trainsets (216 cars)
Formation	4 cars per trainset
Fleet numbers	Z 20901/2 to 21007/8
Operators	SNCF Transilien
Depots	Les Ardoines
Lines served
Specifications
Car body construction	Copper steel Stainless steel
Train length	103.508 m (339 ft 7.1 in)
Width	2.82 m (9 ft 3 in)
Height	4.32 m (14 ft 2 in)
Doors	2 pairs per side, per car
Maximum speed	140 km/h (87 mph)
Weight	245,000 kg (540,000 lb)
Traction system	Alstom OniX IGBT–VVVF
Traction motors	8 × 4 FXA 2858 (asynchronous motors)
Power output	3,464 kW (4,645 hp)
Transmission	Gear wheel, hollow shaft and cardan shaft, ratio : 4.18
Acceleration	1 m/s2 (3.3 ft/s2)
Deceleration	1.05 m/s2 (3.4 ft/s2) (service) 1.10 m/s2 (3.6 ft/s2) (emergency)
Electric system(s)	Overhead line:     25 kV 50 Hz AC     1,500 V DC
Current collector(s)	Pantograph Type AM18
Bogies	type Y401(motor)/Y30PL(trailer), H shape
Braking system(s)	Electrodynamic
Safety system(s)	Crocodile, KVB
Coupling system	Scharfenberg type
Multiple working	Other Z 2N series trains (Z 5600, Z 8800, Z 20500, Z 20900)
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge

The SNCF Class Z 20900 is a double-deck, dual-voltage electric multiple unit trainset that is operated on line C of the Réseau Express Régional (RER), a hybrid suburban commuter and rapid transit system serving Paris and its Île-de-France suburbs.

The 54 four-car trains were built by a consortium of French manufacturer Alstom and Canadian conglomerate Bombardier between 2001 and 2004. The first set was placed into regular passenger service in July 2001.

They are the final equipment produced as part of the Z 2N series of trainsets, which were continuously improved over several generations.

The introduction of the Z 20900 allowed for the oldest equipment on the RER C to be scrapped.