| 321 series | |
| Service: | 2005–present |
| Manufacturer: | Kinki Sharyo |
| Factory: | Higashiōsaka |
| Replaced: | 201 series, 205 series, 207 series (set Z16) |
| Yearconstruction: | 2005–2007 |
| Yearservice: | 1 December 2005 |
| Numberbuilt: | 273 vehicles (39 sets) |
| Formation: | 7 cars per trainset |
| Fleetnumbers: | D1–D39 |
| Operator: | JR-West |
| Depots: | Aboshi |
| Lines: | |
| Carbody: | Stainless steel |
| Trainlength: | 136.6m (448.2feet) |
| Carlength: | 19550mm (end cars)[1] 19500mm (intermediate cars) |
| Width: | 2950mm |
| Height: | 3630mm |
| Doors: | 4 pairs per side |
| Maxspeed: | 120km/h |
| Deceleration: | (emergency) |
| Traction: | Variable frequency (2-level IGBT) |
| Electricsystem: | 1,500 V DC overhead |
| Collectionmethod: | WPS27D scissors-type pantograph |
| Bogies: | WDT63 (powered), WTR246/WTR246A (trailer) |
| Brakes: | Regenerative brake, electronically controlled pneumatic brakes, snow-resistant brake |
| Safety: | ATS-SW, ATS-P |
The is a DC electric multiple unit (EMU) commuter train type operated by West Japan Railway Company (JR-West) in the Kansai Region of Japan.
The 321 series was developed from the earlier 207 series to replace the ageing 201 series and 205 series trains on the Tōkaidō Main Line.[2] One 321 series set also replaced the 207 series (set Z16) withdrawn due to collision damage sustained in the Amagasaki derailment of 25 April 2005.
The 321 series share the same assignments as their 207 series counterparts.[3] [4] All 39 sets are allocated to Aboshi depot.
| Car No. | 1 | 2 | 3 | 4 | 5 | 6 | 7 | |
|---|---|---|---|---|---|---|---|---|
| Designation | M'c | M | T | M' | M | M' | Mc | |
| Numbering | KuMoHa 320 | MoHa 321 | SaHa 321 | MoHa 320 | MoHa 321 | MoHa 320 | KuMoHa 321 | |
| Capacity | 142 | 156 | 156 | 156 | 156 | 156 | 142 | |
| Weight | 35.1 t | 34.1 t | 27.3 t | 33.3 t | 34.1 t | 33.3 t | 35.6 t |
KuMoHa 321 and MoHa 321 cars each have two scissors-type pantographs.