| 681 series | |
|---|---|
A JR-West 681 series train on a Thunderbird service in April 2022 | |
| Manufacturers | Niigata Transys, Kawasaki Heavy Industries, Kinki Sharyo, Hitachi |
| Constructed | 1992 (Prototype set) 1995–1997 |
| Entered service | 1992 |
| Refurbished | 2015–2018 |
| Scrapped | 2015– |
| Number built | 102 vehicles |
| Number in service | 99 vehicles (as of 1 October 2015[update]) |
| Number scrapped | 3 vehicles |
| Formation | 3/6 cars per trainset |
| Operators | JR-West (1992–) Hokuetsu Express (1997–2015) |
| Depots | Kyoto, Kanazawa |
| Lines served | Tokaido Main Line, Kosei Line, Hokuriku Main Line, Nanao Line, Shinetsu Main Line, Joetsu Line, Hokuetsu Express Hokuhoku Line |
| Specifications | |
| Car body construction | Steel |
| Maximum speed | 160 km/h (100 mph) (Hokuhoku Line) 130 km/h (80 mph) (JR lines) |
| Traction system | Thyristor drive + Variable frequency (GTO) |
| Acceleration | 1.8 km/h/s (1.2 mph/s) |
| Deceleration | 5.5 km/h/s (3.4 mph/s)[citation needed] |
| Electric system | 20 kV AC 60 Hz / 1,500 V DC overhead |
| Current collection | WPS27C scissors-type pantograph |
| Braking systems | Regenerative brake, electronically controlled pneumatic brakes, snow-resistant brake |
| Safety systems | ATS-SW, ATS-P |
| Multiple working | 683 series |
| Track gauge | 1,067 mm (3 ft 6 in) |
The 681 series (681系, 681-kei) is a dual-voltage electric multiple unit (EMU) train type operated by West Japan Railway Company (JR-West) on limited express services in Japan.
Four six-car sets (T01–T03, T06) and five three-car sets (T11–T13, T15, T17) are used on Thunderbird services. These trains feature Thunderbird branding. Also four six-car sets (W01–W04) and four three-car sets (W11–W14) were used on Hakutaka services. These trains featured "White Wing" logos.
From February 2015, Hakutaka W sets began being repainted into the same livery as 683 series trainsets used on Shirasagi services, with thin blue and orange lines below the window band.
The pre-series six-car set (T18) and one three-car set (T07) are used on Thunderbird services.
Two six-car sets (N01–N02) and two three-car sets (N11–N12) were formerly used on Hokuetsu Express Hakutaka services. These trains featured "Snow Rabbit Express" logos.
All of the 681 series trainsets used on Thunderbird limited express services underwent a programme of refurbishment from autumn 2015 until the end of fiscal 2018.