| Seibu 10000 series New Red Arrow | |
| Manufacturer: | Hitachi |
| Replaced: | 5000 series |
| Successor: | Seibu 001 series |
| Yearconstruction: | 1993–2003 |
| Yearservice: | 6 December 1993 |
| Refurbishment: | 2003–2008 |
| Numberbuilt: | 84 vehicles (12 sets) |
| Numberservice: | 84 vehicles (12 sets) |
| Formation: | 7 cars per trainset |
| Operator: | Seibu Railway |
| Depots: | Kotesashi, Minami-Iriso |
| Carlength: | 200NaN0 |
| Doors: | One per side |
| Maxspeed: | 105round=5NaNround=5 |
| Traction: | Resistor control Variable frequency (3-level IGBT) (set 10112) |
| Electricsystem: | 1,500 V DC |
| Collectionmethod: | Overhead line |
| Brakes: | Dynamic braking |
The is an electric multiple unit (EMU) train type operated by the private railway operator Seibu Railway on limited express services in the Tokyo area of Japan since 1993.[1]
Branded as "NRA" or "New Red Arrow", the trains are used on Koedo services from Seibu-Shinjuku in Tokyo to Hon-Kawagoe. They were formerly also used on Musashi and Chichibu services from Ikebukuro in Tokyo to Hannō and Seibu-Chichibu stations.[1]
As of 1 April 2012, the fleet consists of 12 7-car sets, formed as follows.[2]
| Car No. | 1 | 2 | 3 | 4 | 5 | 6 | 7 | |
|---|---|---|---|---|---|---|---|---|
| Designation | Tc1 | M1 | M2 | T | M3 | M4 | Tc2 | |
| Numbering | 10100 | 10200 | 10300 | 10400 | 10500 | 10600 | 10700 |
Cars 2, 5, and 6 each have one single-arm pantograph, except set 10112, which has pantographs on cars 2 and 5 only.[2]
The first two trains delivered were introduced in December 1993 on Koedo services from Seibu-Shinjuku in Tokyo to Hon-Kawagoe, replacing the former 5000 series Red Arrow trains.[3]
A further three trainsets were delivered in 1994 and introduced on Chichibu services from Ikebukuro in Tokyo to Seibu-Chichibu on 15 October 1994.[3]
The trains were refurbished internally between 2003 and 2008, and the old seats were re-used in Chichibu Railway 6000 series and Izukyu 8000 series trainsets.
On 13 March 2020, the 10000 series trainsets were withdrawn from Ikebukuro Line and Chichibu Line limited express services,[4] being replaced by 001 series Laview trainsets. Since then, the fleet of 10000 series has been used on limited express service on the Seibu Shinjuku Line.[5]
Three cars were transferred to the Toyama Chihō Railway in October 2020. After spending 2021 undergoing preparation, they entered service on 19 February 2022.[6]
The sets are monoclass with 2+2 abreast reclining seating. Seat pitch is 10700NaN0.[7]