E721 series
| E721 / SAT721 / AB900 series | |
|---|---|
E721-0 series (right) and the SAT721 series variant (left), August 2007 | |
| Manufacturers | Kawasaki Heavy Industries, Tokyu Car Corporation, J-TREC |
| Replaced | 417, 455, 717 and 719 series |
| Constructed | 2006– |
| Entered service | February 2007 |
| Number under construction | 36 vehicles (9 sets) |
| Number built | 146 vehicles (63 sets) |
| Number in service | 142 vehicles (61 sets) |
| Number scrapped | 4 vehicles (2 sets, tsunami damage) |
| Formation | 2 or 4 cars per set |
| Fleet numbers | P1–P44, P501–P504, P4-1–P4-19, SA101–SA103 |
| Operators | JR East Sendai Airport Transit (SAT721) Abukuma Express (AB900) |
| Depot | Sendai |
| Lines served | |
| Specifications | |
| Car body construction | Stainless steel |
| Car length | 20,000 mm (65 ft 7 in) |
| Width | 2,950 mm (9 ft 8 in) |
| Floor height | 950 mm (3 ft 1 in) |
| Doors | 3 pairs per side |
| Maximum speed | 120 km/h (75 mph) |
| Power output | 125 kW (168 hp) per motor |
| Electric system | Overhead line, 20 kV 50 Hz AC |
| Current collection | Pantograph |
| Bogies | DT72 (motored), TR256 (trailer) |
| Safety system | ATS-Ps |
| Multiple working | 701 series |
| Track gauge | 1,067 mm (3 ft 6 in) |
The E721 series (Japanese: E721系) is an AC electric multiple unit (EMU) train type operated by East Japan Railway Company (JR East) on services in the Sendai area of Japan since February 2007.