SJ Dm3

Dm
A Dm3 in MTAB colors at Abisko Östra
Type and origin
Power typeElectric
BuilderASEA
Build date1954-1971
Total produced97
20 Dm+Dm
19 Dm+Dm3+Dm
Specifications
Configuration:
 • UIC1′D+D1′ (Dm)
1′D+D+D1′ (Dm3)
Gauge1,435 mm (4 ft 8+12 in)
Wheel diameter1,530 mm (5 ft 0.24 in)
Length25,100 mm (82 ft 4+14 in) (Dm)
35,250 mm (115 ft 7+34 in) (Dm3)
Loco weight190 t (187.0 long tons; 209.4 short tons)
273.2 t (268.9 long tons; 301.2 short tons)
Electric system/s15 kV  16.7 Hz AC catenary
Current pickup(s)Pantograph
Performance figures
Maximum speed75 km/h (47 mph)
Power output4,800 kW (6,400 hp) (Dm)
7,200 kW (9,700 hp) (Dm3)
Tractive effort940 kN (210,000 lbf) (Dm3)
Career
DispositionReplaced by IORE from 2010s

Dm and Dm3 is a series of locomotives used by Swedish State Railways (Swedish: Statens Järnvägar, SJ) and later Malmtafik i Kiruna (MTAS) for pulling iron ore trains on the Iron Ore Line in Sweden and Ofoten Line in Norway. A total of 39 double-locomotives (Dm) were delivered between 1954 and 1971, built by ASEA. A further 19 center locomotives (Dm3) were later delivered. Norwegian State Railways also operated 12 similar locomotives, designated NSB El 12. The Dm is a articulated, freight-optimized version of the Da-locomotive.