British Rail Class 375

British Rail Class 375 Electrostar
Refurbished and repainted 375306 sits in Strood.
The interior of a refurbished Class 375
In service	April 2001 - current
Manufacturer	ADtranz Derby (now Bombardier)
Family name	Electrostar
Replaced	Class 365 Class 411 Class 421 Class 423 Class 466 Class 508
Refurbishment	April 2015 - 2018
Number built	140 units
Number in service	112 units (28 units renumbered to Class 377/3)
Formation	375/3 - 3 cars per unit (DMOC-TOSL-DMOS) 375/6 - 4 cars per unit (DMOC-PTOSL-MOSL-DMOC) (refurbished - (DMOS-PTOSL-MOCL-DMOS)) Others - 4 cars per unit (DMOC-TOSL-MOSL-DMOC) (refurbished - (DMOS-TOSL-MOCL-DMOS))
Capacity	176 seats (375/3) 236 seats (375/6/7/8) 273 seats (375/9)
Operator(s)	Southeastern
Specifications
Car length	20.4 m (66 ft 11 in)
Width	2.80 m (9 ft 2 in)
Height	3.78 m (12 ft 5 in)
Maximum speed	100 mph (161 km/h)
Weight	133.1 tonnes (131.0 long tons) (375/3 only) 173.6 tonnes (170.9 long tons) (others)
Power output	1 megawatt (1,300 hp) (375/3 only) 1.5 megawatts (2,000 hp) (others)
Electric system(s)	750 V DC 3rd rail 25 kV 50 Hz AC Overhead (375/6 only)
Coupling system	Dellner
Track gauge	1,435 mm (4 ft 8 1⁄2 in) standard gauge

The British Rail Class 375 Electrostar electric multiple unit train was built by Bombardier Transportation (previously ADtranz) at their Derby Works, from 1999 to 2005. The Electrostar family, which also includes classes 357, 376, 377, 378, 379 and 387, is the most numerous type of EMU introduced since the privatisation of British Rail.

These units form the basis of Southeastern's mainline fleet.

These trains are owned by Eversholt Rail Group (formerly HSBC Rail) and leased to Southeastern for operation from London to Kent and parts of East Sussex.

The first batch of 30 trains (Class 375/6) were fitted with both a pantograph and third-rail shoes for dual voltage, where the remainder of these trains have one coach in each unit with a recess where the pantograph could be fitted, allowing for future conversion to run on AC power from overhead lines. Although the units are normally operated on 750 V DC lines only, the class is numbered in the 3xx series which usually refers to AC operation. The option is available for the 375/6 units to be leased to a network which operates on 25 kV AC overhead lines. Southern's Class 375 units have since been converted to Class 377.