Osaka Municipal Subway New 20 series

SpecificationsCar body constructionStainless steelTrain length187.4 m (614 ft 10 in) (21 series)
112.6 m (369 ft 5 in) (22/23/24/OTS series)
75.2 m (246 ft 9 in) (25 series)Car length18.9 m (62 ft 0 in) (end cars)
18.7 m (61 ft 4 in) (intermediate cars)Width2.89 m (9 ft 6 in) (end cars)
2.88 m (9 ft 5 in) (intermediate cars)Height3,745 mm (12 ft 3 in)Doors4 pairs of sliding doors per sideMaximum speed95 km/h (59 mph) (24 series; Kintetsu Keihanna Line)
70 km/h (43.5 mph) (other series)Traction systemVariable-frequencyTraction motorsFour 140 kW (188 hp) traction motors per motor carPower output560 kW (751 hp) per motor carAcceleration3 km/(h⋅s) (1.9 mph/s) (21/24 series)
2.5 km/(h⋅s) (1.6 mph/s) (other series)Deceleration3.5 km/(h⋅s) (2.2 mph/s)
4.5 km/(h⋅s) (2.8 mph/s) (emergency)Electric system(s)750 V DCCurrent collector(s)Third rail contact shoesBraking system(s)Electric commanding brake with regenerative brakeSafety system(s)WS-ATC (21/22/23/24/OTS series)
WS-ATC, CS-ATC, ATO (25 series) TASC (21 series)Track gauge1,435 mm (4 ft 8+1⁄2 in)

The Osaka Municipal Subway New 20 series (大阪市交通局新20系) is a rapid transit electric multiple unit (EMU) train type operated by Osaka Municipal Subway in Japan since 1990.

Variants

The New 20 series was developed from the earlier 20 series (ja:大阪市交通局20系電車) trains introduced on the Chūō Line from 1984.

•   21 series: 10-car sets used on the Midōsuji Line and the Kita-Osaka Kyuko Railway Namboku Line
•   22 series: 6-car sets used on the Tanimachi Line
•   23 series: 6-car sets used on the Yotsubashi Line
•   24 series: 6-car sets used on the Chūō Line and the Kintetsu Keihanna Line
•   25 series: 4-car sets used on the Sennichimae Line
•   OTS series (OTS系): 6-car sets introduced in 1997 on the opening of the Cosmosquare to Osakakō segment of the Chūō Line and owned by Osaka Port Transport System (OTS) [ja], transferred to Tanimachi Line in 2006 and reclassified as 22-50 series

• 
  A 21 series set in February 2006
• 
  A 22 series set in April 2006
• 
  A refurbished 23 series set in August 2012
• 
  A refurbished 24 series set in April 2017
• 
  A refurbished 25 series set in February 2014
• 
  An OTS series set in July 2002
• 
  21 series rooftop AC condenser unit

Formation

Trains are formed as follows.^[1]

21 series

Car No.	1	2	3	4	5	6	7	8	9	10
Designation	Tec2	Ma2	Mb2	T	T'	Ma1'	Tbp	Mb1	Ma1	Tec1
Numbering	219xx	212xx	213xx	215xx	218xx	214xx	217xx	211xx	210xx	216xx

Car 6 is designated as a women-only car (Weekday only).

22/23/24/OTS series

Car No.	1	2	3	4	5	6
Designation	Tec1	Mb1'	T'	Mb2	Ma2	Tec2
Numbering	2600	2100	2800	2300	2200	2900

22 series car 3 is designated as a women-only car (Rush hour only).

25 series

Car No.	1	2	3	4
Designation	Tec1	Mb1'	Mb2	Tec2
Numbering	256xx	251xx	253xx	259xx

References