| Rz | |
| Powertype: | Electric |
| Builder: | ASEA |
| Builddate: | 1982 |
| Totalproduction: | 1 |
| Uicclass: | Bo′Bo′ |
| Length: | 15520frac=8NaNfrac=8 |
| Locoweight: | 81t |
| Maxspeed: | 160km/h |
| Electricsystem: | catenary |
| Collectionmethod: | Pantograph |
| Poweroutput: | 4000abbr=onNaNabbr=on |
Rz was an electric locomotive built by ASEA to test out asynchronous motors. It was built in 1982 and closely related to the Rc-series. It was test run until 1989 on Siljansbanan, but there was never any mass production of it.
After ASEA merged with Brown, Boveri & Cie to form Asea Brown Boveri in 1988 the development of asynchronous motors was moved to Switzerland. The Rz technology was utilized for the development of the X2-train and the Rc5-locomotive.
In 1992 the engine was donated to the Swedish Railway Museum, but they were not particularly interested in it and in 1999 it was moved to Örebro to become a parts locomotive.