British Rail Class 357

British Rail Class 357
Electrostar
A Class 357 at Southend East in 2020
The interior of a Class 357/3 in 2020
In service2000–present
Manufacturer
Built atDerby Litchurch Lane Works
Family nameElectrostar
Replaced
Constructed1999–2002
Number built74
Formation
  • 4 cars per unit:
  • DMSO-MSO-PTSO-DMSO
Capacity
  • 357/0 and /2: 282 seats
  • 357/3: 222 seats
Owners
Operatorsc2c
Specifications
Car length
  • DMSO: 20.40 m (66 ft 11 in)
  • MSO/PTSO: 19.99 m (65 ft 7 in)
Width2.80 m (9 ft 2 in)
Height3.78 m (12 ft 5 in)
Maximum speed100 mph (160 km/h)
Weight
  • DMSO vehs.: 40.7 t (40.1 LT; 44.9 ST)
  • MSO vehs.: 36.7 t (36.1 LT; 40.5 ST)
  • PTSO vehs.: 39.5 t (38.9 LT; 43.5 ST)
  • Unit total: 157.6 t (155.1 LT; 173.7 ST)
Traction motors6 × three-phase AC
Power output1,500 kW (2,011 hp)
Electric system(s)25 kV 50 Hz AC Overhead lines
Current collector(s)Pantograph
Bogies
  • Powered: Adtranz P3-25
  • Unpowered: Adtranz T3-25
Coupling systemTightlock
Track gauge1,435 mm (4 ft 8+12 in) standard gauge
Notes/references
Sourced from unless otherwise noted.

The British Rail Class 357 Electrostar is a class of alternating current (AC) electric multiple unit (EMU) passenger train built by Adtranz until 2001, later Bombardier, at Derby Litchurch Lane Works between 1999 and 2002. They were delivered in two batches at a cost of approximately £292 million.

They are the first member of the Electrostar family, which also includes Classes 375, 376, 377, 378, 379 and 387, and are the most numerous type of EMU built in the post-privatisation period of Britain's railways. They have the same basic design, bodyshell and core structure as the Turbostar diesel multiple unit (DMU), which is in turn the most common post-privatisation diesel multiple unit family, and both evolved from the Class 168 Clubman design by Adtranz. The Class 357 fleet is operated by c2c on the London, Tilbury and Southend line.