ASEA SJ O (Oa/Ob)

Built by ASEA, Siemens

Top speed

60 km/h

37 mph

Power output

1,200 kW

1,609 hp

Length

18.62 m

61 ft 1 in

Track gauge

1,435 mm

Standard gauge

Years built

1914–1915

13 units

Overview of the ASEA SJ O (Oa/Ob)

Discover the powerful SJ O (Oa/Ob) electric locomotive, a remarkable piece of Swedish railway history.

Originally built by ASEA and Siemens between 1914 and 1915, these locomotives served both Bergslagernas Järnvägar (BJ O) and later the Swedish Railways (SJ O).

With a standard gauge of 1435 mm and a substantial length of 18.62 meters, the SJ O was a robust design for its era.

This electric powerhouse delivered an impressive 1200 kW of power, capable of reaching speeds up to 60 km/h, making it a dependable workhorse on the network.

Operating on 15 kV AC 16.7 Hz electric systems, it was well-suited to the electrification standards of the time.

Explore the engineering and heritage of the SJ O (Oa/Ob) electric locomotive.

ASEA SJ O (Oa/Ob) technical specifications

	Value	Imperial / US
Built by	ASEA, Siemens · 1914–191513 units
Top speed	60 km/h37 mph	37 mph
Power output	1,200 kW1,609 hp	1,609 hp
Electric systems	15 kV AC 16.7 Hz
Track gauge	1,435 mmStandard gauge4 ft 8½ in	4 ft 8½ in
Length	18.62 m61 ft 1 in	61 ft 1 in