Da is a series of
locomotives used by
Swedish State Railways (
Swedish: Statens Järnvägar, SJ). 93 units were built by
ASEA between 1952 and 1957. They remained in service until the 1990s.
History
After the last
D-locomotive had been delivered in 1943, SJ needed more locomotives during the late 1940s with new lines being electrified. The solution was the Da, a modernised version of the D-type including the rigid-frame
coupling rod layout that was by then regarded as obsolete by most other undertakings. It was used as a universal locomotive throughout the SJ system. A more powerful, but slower
Dm series was delivered at the same time for use on
Malmbanan. During the 1970s the Da's were rebuilt, including increased cab comfort. SJ started retiring the locos during the 1980s and had finished the task by the mid 1990s. Some units were bought by
Tågfrakt and
Tågkompaniet, later being sold to
NetRail. One unit has been preserved by the
Swedish Railway Museum.