Electrostar

Electrostar
Class 377, no. 377 213, at Harrow & Wealdstone station on 28 September 2004. This unit is in the Southern livery.
In service	1999 - present
Manufacturer	Bombardier Transportation, Derby (formerly ADtranz)
Replaced	Class 421 Class 423 Class 319 Class 456 Class 313 Class 508 Class 365 Class 466 Class 411 Class 465 Class 310 Class 317 Class 312 Class 442 Class 165 Class 166 Class 321
Number built	480 trainsets
Formation	3, 4 or 5 cars per trainset
Capacity	Varies depending on number of carriages and seating configuration, see individual articles for details
Operator(s)	Abellio Greater Anglia c2c Southeastern Southern London Overground Thameslink Great Western Railway Gautrain Great Northern
Specifications
Car length	Class 357: DMSO: 20.75 m (68 ft 1 in) each, MSO and PTOSL: 20.10 m (65 ft 11 in) each Classes 376 and 377 DMSO: 20.4 m (66 ft 11 in) each, MSO and PTOSL: 19.99 m (65 ft 7 in) each
Width	2.80 m (9 ft 2 in)
Height	3.78 m (12 ft 5 in)
Maximum speed	75 mph (120 km/h) (376/378) 100 mph (160 km/h) (357/375/377/379) 110 mph (180 km/h) (387)
Weight	Class 357 C2c:157.6 t Classes 375/3 and 377/3: 133.1 t Classes 375/6, 375/7, 377/1, 377/2: 173.6 t
Power output	2x373 = 746 kW kW (377/3 only) 3x373 = 1,119 kW (others, third rail) 3x560 = 1,680 kW (AC mode)
Electric system(s)	25 kV AC Overhead lines 750 V DC third rail
Safety system(s)	AWS, TPWS
Track gauge	1,435 mm (4 ft 8 1⁄2 in)

Electrostar is the name given to a series of related electric multiple-unit (EMU) passenger trains manufactured by Bombardier Transportation (formerly ADtranz) at their Litchurch Lane Works in Derby, England. Since the privatisation of British Rail, it has become the most common new EMU type in Britain, where different variants referred to as Class 357, Class 375, Class 376, Class 377, Class 378, Class 379 and Class 387, are most common on the high-volume suburban commuter routes in South, North and East London, and mainline services south to Surrey, Sussex, Kent & South Essex coasts and north to Cambridge and Stansted Airport . It shares the same bodyshell and core structure as the Turbostar, which is in turn the most common post-privatisation diesel multiple unit (DMU) family, and both evolved from the Class 168 Clubman design by ADtranz.

The Clubman/Turbostar/Electrostar platform is a modular design, which share the same basic design, bodyshell and core structure, and is optimised for speedy manufacture and easy maintenance. It consists of an underframe, which is created by seam-welding a number of aluminium alloy extrusions, upon which bodyside panels are mounted followed by a single piece roof, again made from extruded sections. The car ends (cabs) are made from glass-reinforced plastic and steel, and are huck-bolted onto the main car bodies. Underframe components are collected in ‘rafts’, which are bolted into slots on the underframe extrusion. The mostly aluminium alloy body gives light weight to help acceleration and energy efficiency.