E531 series

The E531 series (Japanese: E531系, Hepburn: E531-kei) is an electric multiple unit (EMU) train type operated by East Japan Railway Company (JR East) in Japan. It was introduced by JR East on 9 July 2005 to replace the aging 403 and 415 series EMUs running on the Jōban Line from Ueno Station in Tokyo. The stock is a dual-voltage (1,500 V DC & 20 kV AC) development of the DC-only E231 series suburban EMU design, and can run at speeds of up to 130 km/h (81 mph) in service.

E531 series
An E531 series train on the Joban Line (in March 2019 Between Matsudo Station and Kanamachi Station)
In service2005–present
ManufacturerTokyu Car Corporation, Kawasaki Heavy Industries, JR East, J-TREC
Replaced403 series, 415 series, some E501 series
Constructed2005–2020, 2024
Entered service9 July 2005
Number built
  • 461 vehicles
    • 26 × 10-car
    • 40 × 5-car
    • 1 × end car
Number in service460 vehicles
Formation5/10 cars per trainset
Fleet numbers
  • K401–K426 (10-car sets)
  • K451–K483 (standard 5-car sets)
  • K551–K557 (cold-weather 5-car sets)
Operators JR East
DepotsKatsuta
Lines served
  • ■ Ueno–Tokyo Line
  • ■ JJ Jōban Line
  • ■ Mito Line
  • ■ Tōhoku Main Line
Specifications
Car body constructionStainless steel
Car length20,000 mm (65 ft 7 in)
Width2,950 mm (9 ft 8 in)
Floor height1,130 mm (3 ft 8 in)
Doors4 pairs per side
Maximum speed130 km/h (81 mph)
Traction systemPWM 2-level IGBT–VVVF (Hitachi)
Traction motors4 × 140 kW (190 hp) 3-phase AC induction motor (Hitachi)
Power output1.12 MW (1,500 hp) (5-car sets)
2.24 MW (3,000 hp) (10-car sets)
Acceleration2.5 km/(h⋅s) (1.6 mph/s)
Deceleration4.2 km/(h⋅s) (2.6 mph/s)
Electric system(s)1,500 V DC and 20 kV 50 Hz AC, both from overhead catenary
Current collector(s)PS37A single-arm pantograph
BogiesDT71 (motored)
TR255 (trailer)
Braking system(s)Regenerative brake
Safety system(s)ATS-SN, ATS-P, ATS-Ps
Track gauge1,067 mm (3 ft 6 in)
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