721 series
| 721 series | |
|---|---|
A pair of 721 series 3-car sets led by set F-3, August 2008
|
|
| In service | 1988–Present |
| Manufacturer | Hitachi, JR Hokkaido, Kawasaki Heavy Industries, Tokyu Car |
| Constructed | 1988–2003 |
| Number built | 135 vehicles (34 sets) |
| Number in service | 135 vehicles (34 sets) |
| Formation | 3/6 cars per trainset |
| Operator(s) | JR Hokkaido |
| Depot(s) | Sapporo |
| Line(s) served | Hakodate Main Line, Chitose Line |
| Specifications | |
| Car body construction | Stainless steel |
| Car length | 21,670 mm (71 ft 1 in) (end cars) 21,300 mm (69 ft 11 in) (intermediate cars) |
| Width | 2,954 mm (9 ft 8.3 in) |
| Height | 4,090 mm (13 ft 5 in) |
| Doors | 3 per side |
| Maximum speed | 130 km/h (80 mph) |
| Traction system |
Thyristor drive (1-5th batch) GTO-VVVF (6th batch onwards) |
| Electric system(s) | 20 kV AC (50 Hz) |
| Current collection method | Overhead line |
| Safety system(s) | ATS-DN |
| Multiple working | 731 series, 733 series, 735 series |
| Track gauge | 1,067 mm (3 ft 6 in) |
The 721 series (721系?) is an AC electric multiple unit (EMU) operated by Hokkaido Railway Company (JR Hokkaido) on Sapporo area suburban services in Hokkaido, Japan since 1988.
The trains were built jointly by Hitachi, JR Hokkaido (Naebo Factory), Kawasaki Heavy Industries, and Tokyu Car (Yokohama).
As of 1 April 2012, the fleet consists of 135 vehicles, formed as 23 3-car sets and 11 6-car sets.
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