In 1989 and 1990, the South African Railways placed twenty-five Class 10E2 electric locomotives with a Co-Co wheel arrangement in mainline service.

[1][2] The 3 kV DC Class 10E2 electric locomotive was designed for the South African Railways (SAR) by Toshiba and built by Union Carriage and Wagon (UCW) in Nigel, Transvaal.

The Class 10E has riffled roof ends and parts of the sill protrude slightly past the bottom edge of the body sides.

The Class 10E2 has smooth unriffled roof ends and no part of the sill protrudes past the bottom edge of the body sides.

[6] On Class 10E2 units which were repainted in Transnet Freight Rail livery from c. 2011, the locomotive numbers are displayed as, for example, either "E10110" or "E10 125", instead of the earlier "10-110".