British Rail Class 377

British Rail Class 377
*Electrostar*
British Rail Class 377; Electrostar
	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 319; Class 421; Class 423; Class 455; Class 456; Class 313
Number built	211 units; (excluding 28 375/3 conversions)
Successor	Class 700 (Thameslink)
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);
Owners	Porterbrook
Operators	Southern; Southeastern;
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	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);
Traction motors	4–8 × 200 kW (270 hp)
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);
Electric system(s)	750 V DC 3rd rail; 25 kV 50 Hz AC Overhead lines (377/2, 377/5 and 377/7 only);
Current collector(s)	Contact shoe; Brecknell Willis pantograph (377/2, 377/5 and 377/7 only);
Coupling system	Dellner
Multiple working	Within class, Class 378 and Class 379
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge

The British Rail Class 377 Electrostar is a British dual-voltage electric multiple unit passenger train (EMU) built by Bombardier Transportation on its Electrostar platform at Derby Litchurch Lane Works from 2001 to 2014.

^ Sherratt, Philip, ed. (2023). "ROSCO Fleets". Modern Railways: Review 2023. Stamford: Key Publishing. pp. 18–19. ISBN 978-1-80282-569-5.
^ ^a ^b Pritchard, R. N. (2012). British railways locomotives & coaching stock 2012. Platform 5. pp. 292, 294. ISBN 978-1-902336-92-3. OCLC 795598388.