British Rail Class 345

The British Rail Class 345 Aventra is a fleet of electric multiple unit passenger trains built by Bombardier Transportation for use on London's Elizabeth line. Part of Bombardier's Aventra family of trains, the contract for their delivery was awarded as part of the Crossrail project in February 2014. A total of 70 nine-car units  each able to carry 1,500 passengers  were constructed in Derby between 2015 and 2019, at a cost of over £1 billion. The first unit entered service on 22 June 2017.

British Rail Class 345
Aventra
Class 345 unit at Abbey Wood
Interior of a Class 345 unit
In service22 June 2017  present
ManufacturerBombardier Transportation
Built atDerby Litchurch Lane Works
Family nameAventra
Replaced
Constructed2015–2019
Number built70
Formation9 cars per unit
(See § Fleet details)
Fleet numbers345001345070
Capacity1500 total (454 seated, 1046 standing)
Owners345 Rail Leasing
Operators
  • Current: MTR Elizabeth line
  • Former: TfL Rail
Depots
Lines served
  • GEML (Liverpool Street to Shenfield)
  • GWML (Paddington to Heathrow and Reading)
  • Elizabeth line (Paddington to Abbey Wood and Stratford)
Specifications
Car body constructionAluminium, with steel cabs
Train length204.73 m (671 ft 8 in)
Car length
  • DM vehs.: 23.615 m (77 ft 5.7 in)
  • Others: 22.500 m (73 ft 9.8 in)
Width2.772 m (9 ft 1.1 in)
Height3.760 m (12 ft 4.0 in)
Floor height1.145 m (3 ft 9.1 in)
DoorsDouble-leaf sliding plug,
each 1.450 m (4 ft 9.1 in) wide
(3 per side per car)
Wheel diameter825–750 mm (32.5–29.5 in) (new–worn)
Wheelbase
  • Per bogie:
  • 2.25 m (7 ft 5 in)
  • Over bogie centres:
  • 16.00 m (52 ft 6 in)
Maximum speed90 mph (145 km/h)
Weight
  • 319 tonnes (314 long tons; 352 short tons)
Traction motors20 × 250 kW (340 hp)
(2 per powered bogie)
Power output4,400 kW (5,900 hp) (at rail)
Acceleration1 m/s2 (3.3 ft/s2)
Electric system(s)25 kV 50 Hz AC overhead
Current collector(s)Pantograph
UIC classification2′Bo′+2′Bo′+Bo′Bo′+2′Bo′+2′2′+Bo′2′+Bo′Bo′+Bo′2′+Bo′2′
BogiesBombardier FLEXX Eco 5011
Braking system(s)Electro-pneumatic (disc) and regenerative
Safety system(s)
Coupling systemDellner
Track gauge1,435 mm (4 ft 8+12 in) standard gauge
Notes/references
Sourced from unless otherwise noted.
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