321 series

321 series
321 series
	321 series set D11 in February 2021
In service	2005–present
Manufacturer	Kinki Sharyo
Built at	Higashiōsaka
Replaced	201 series, 205 series, 207 series (set Z16)
Constructed	2005–2007
Entered service	1 December 2005
Number built	273 vehicles (39 sets)
Formation	7 cars per trainset
Fleet numbers	D1–D39
Operators	JR-West
Depots	Aboshi
Lines served	A Tōkaidō Main Line; A Sanyo Main Line; B Kosei Line; G Fukuchiyama Line; H JR Tōzai Line; H Katamachi Line; Q Yamatoji Line;
Specifications
Car body construction	Stainless steel
Train length	136.600 m (448 ft 2.0 in)
Car length	19,550 mm (64 ft 2 in) (end cars); 19,500 mm (64 ft 0 in) (intermediate cars)
Width	2,950 mm (9 ft 8 in)
Height	3,630 mm (11 ft 11 in)
Doors	4 pairs per side
Maximum speed	120 km/h (75 mph)
Weight	232.8 t (229.1 long tons; 256.6 short tons)
Traction system	Variable frequency (2-level IGBT)
Power output	270 kW (362 hp)
Acceleration	2.5 km/(h⋅s) (1.6 mph/s)
Deceleration	4.2 km/(h⋅s) (2.6 mph/s) (emergency)
Electric system(s)	1,500 V DC overhead
Current collector(s)	WPS27D scissors-type pantograph
Bogies	WDT63 (powered), WTR246/WTR246A (trailer)
Braking system(s)	Regenerative brake, electronically controlled pneumatic brakes, snow-resistant brake
Safety system(s)	ATS-SW, ATS-P
Track gauge	1,067 mm (3 ft 6 in)

The 321 series (321系, 321-kei) is a DC electric multiple unit (EMU) commuter train type operated by West Japan Railway Company (JR-West) in the Kansai Region of Japan.

Quick Facts In service, Manufacturer ...

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

Overview