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.
Quick facts British Rail Class 377 Electrostar, In service ...
British Rail Class 377
Electrostar |
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 The interior of a Southern Class 377/6 |
| In service | May 2003 – present |
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| Manufacturer | Bombardier Transportation |
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| Built at | Derby Litchurch Lane Works |
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| Family name | Electrostar |
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| Replaced | Class 313 |
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| Number built | 211 units
(excluding 28 375/3 conversions) |
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| Successor | Class 700 (Thameslink) |
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| Formation | - 377/1/2/4/5: 4 cars per unit (DMOC-MOSL-PTOSL-DMOC)
- 377/3: 3 cars per unit (DMOC-PTOSL-DMOS)
- 377/6/7: 5 cars per unit (DMOC-MOSL-PTOSL-MOS(2)-DMOS)
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| Owners | Porterbrook[1] |
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| Operators | |
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| Car length | 20.4 m (66 ft 11+1⁄8 in) |
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| Width | 2.80 m (9 ft 2+1⁄4 in) |
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| Height | 3.78 m (12 ft 4+7⁄8 in) |
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| Maximum speed | 100 mph (161 km/h) |
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| Weight | - 173.6 t (170.9 long tons; 191.4 short tons) (377/1, /2, /4, /5)
- 133.1 t (131.0 long tons; 146.7 short tons) (377/3 only)
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| Traction motors | 4–8 × 200 kW (270 hp) |
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| Power output | - 1,200 kW (1,600 hp) (377/1, /2, /4, /5)
- 800 kW (1,100 hp) (377/3 only)
- 1,400 kW (1,900 hp) (377/6 and /7)
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| Electric system(s) | |
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| Current collector(s) | - Contact shoe
- Brecknell Willis pantograph (377/2, 377/5 and 377/7 only)
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| Coupling system | Dellner |
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| Multiple working | Within class, Class 378[2] and Class 379[2] |
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| Track gauge | 1,435 mm (4 ft 8 1⁄2 in) standard gauge |
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