British Rail Class 377 Electrostar | |
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![]() A Southern Class 377/1 at Clapham Junction in 2024 | |
![]() The interior of a Southern Class 377/6 | |
In service | May 2003 – present |
Manufacturer | Bombardier Transportation |
Built at | Derby Litchurch Lane Works |
Family name | Electrostar |
Replaced | Class 313 |
Number built | 211 units (excluding 28 375/3 conversions) |
Successor | Class 700 (Thameslink) |
Formation |
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Operator(s) | |
Specifications | |
Car length | 20.4 m (66 ft 11+1⁄8 in) |
Width | 2.80 m (9 ft 2+1⁄4 in) |
Height | 3.78 m (12 ft 4+7⁄8 in) |
Maximum speed | 100 mph (161 km/h) |
Weight |
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Traction motors | 4–8 × 200 kW (270 hp) |
Power output |
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Electric system(s) |
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Current collection method |
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Coupling system | Dellner |
Multiple working | Within class, Class 378[1] and Class 379[1] |
Track gauge | 1,435 mm (4 ft 8 1⁄2 in) standard gauge |
The Class 377 Electrostars are electric multiple units built by Bombardier Transportation (previously ADtranz) at their Derby Works, from 2001-2014. The Electrostar family, which also includes Classes 357, 375, 376, 378, 379 and 387 and is the most numerous type of EMU built in the post-privatisation period of Britain's railways.