Seibu 401 series

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Seibu 401/411 series
A Jōshin 150 series train converted from Seibu 401 series
In service	Seibu Railway 1968–1997 Jōshin Electric Railway 1992–2019 Ohmi Railway 1997–present (820 series) 1998–present (800 series) 1998–2019 (700 series)
Manufacturer	Seibu Tokorozawa Railway Works
Entered service	1968 (Seibu Railway as 411 series) 1990 (Sangi Railway) 1992 (Jōshin Dentetsu Jōshin Line) 1997 (Ohmi Railway 820 series) 1998 (Ohmi Railway 700 and 800 series)
Refurbished	1978
Number built	38 cars
Number scrapped	2 cars (Ohmi Railway 700 series)
Successor	Jōshin 700 series
Formation	2 cars per trainset
Operators	Seibu Railway Sangi Railway Jōshin Electric Railway Ohmi Railway
Lines served	Seibu Shinjuku Line, Seibu Tamagawa Line, Sangi Line, Jōshin Dentetsu Jōshin Line
Specifications
Car body construction	Steel
Car length	20 m (65 ft 7 in)
Doors	3 pairs per side
Maximum speed	100 km/h (62 mph)
Traction system	Resistor control
Traction motors	411 series: MT15E 401 series: HS-836-Frb HS-836-Krb TDK-8090-A
Power output	120kW
Electric system(s)	1,500 V DC overhead catenary
Current collector(s)	Pantograph
Safety system(s)	Seibu ATS
Multiple working	All Seibu 3-door trains
Track gauge	1,067 mm (3 ft 6 in)

The Seibu 401 series (西武401系) is an electric multiple unit (EMU) train type operated by the private railway operator Seibu Railway on commuter services in the Tokyo area of Japan from 1978 to 1997.

The first 401 series train was constructed in 1968, then known as 411 series. At the time before conversion. 411 series cars had the MT15E traction motors, in later years Seibu converted all 411 series cars to Seibu 401 series. MT15E traction motors were replaced with MT46-based Hitachi resistor-controlled motors. The last remaining trains were withdrawn in 1997.

401 series train sets were transferred to Sangi Railway in 1990. Among other Seibu EMUs sent to that railway, it's the only 2-car EMU series on Sangi Railway line.

• Ohmi 800/820 series - entered service in 1997 (820 series) and 1998 (800 series)
• Ohmi 700 series - entered service in June 1998;^[1] withdrawn in 2019.

The 800 and 820 series conversion included modifications of the trains, so that they won't make contact with the station platforms.^[2]

• 
  Modified inner car ends on a 800 series set
• 
  A 800 series train in May 2007
• 
  A 700 series train in May 2007
• 
  Ohmi Railway set 822F in January 2017

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