JKOY Class Sm5

JKOY Class Sm5
JKOY Class Sm5
	Sm5 unit at Tuomarila railway station.
	The interior of an Sm5 unit.
In service	2009–
Manufacturer	Stadler Rail
Built at	Bussnang, Switzerland
Family name	FLIRT
Replaced	Sm1, Sm2
Constructed	2008–2017
Number built	81
Number in service	81
Formation	4-car sets
Fleet numbers	94 10 2081 001–081
Capacity	583
Operators	VR Group
Depots	Ilmala
Lines served	All Helsinki commuter rail lines
Specifications
Car body construction	Aluminium
Train length	75.2 m (246 ft 9 in)
Width	3.2 m (10 ft 6 in)
Height	4.4 m (14 ft 5 in)
Floor height	600 mm (24 in)
Low-floor	70%
Platform height	550 mm (22 in)
Doors	1 pair of plug doors per motor car; 2 pairs of plug doors per trailer car;
Wheel diameter	870 mm (34 in) (motorised bogies, new); 800 mm (31 in) (trailer bogies, new);
Wheelbase	2,700 mm (8 ft 10 in) (motorised bogies); 2,750 mm (9 ft 0 in) (trailer bogies);
Maximum speed	160 km/h (100 mph)
Weight	132 t (130 long tons; 146 short tons)
Axle load	20.5 t (20.2 long tons; 22.6 short tons) (motorised bogies); 20.5 t (20.2 long tons; 22.6 short tons) (trailer bogies);
Traction system	ABB BORDLINE CC750 IGBT–VVVF
Traction motors	4 × TSA TMF 59-39-4 500 kW (670 hp)
Power output	2,000 kW (2,700 hp)
Transmission	Voith SZH-595 gearbox
Acceleration	1.2 m/s2 (3.9 ft/s2)
Electric system(s)	25 kV 50 Hz AC catenary
Current collector(s)	Pantograph
UIC classification	Bo′2′2′2′Bo′
Safety system(s)	ATP-VR/RHK
Coupling system	Scharfenberg
Track gauge	1,524 mm (5 ft)
Notes/references
	Sourced from except where noted.

The Sm5 electric multiple unit (EMU) is a low-floor train used on the Helsinki commuter rail network. Unlike other train types on the network, the Sm5 units are owned by Pääkaupunkiseudun Junakalusto Oy, a subsidiary of the cities of Helsinki, Espoo, Vantaa and Kauniainen. The units are leased to the Helsinki Regional Transport Authority (HSL), and VR operates them.