It is a standard-gauge AC diesel transmission locomotive used for mainline freight purpose, which has been exported to Australia. The locomotive adopts double cabs and an internal corridor structure. It is installed with 20V4000R43L diesel engines with a max. loading power of 3,150kW and a max. operating speed of 120km/h.SDA1 with proprietary intellectual property rights is the first AC diesel transmission locomotive in China which was sold to developed countries. It complies with international technical standards and reaches the emission requirements of EU IIIA/UIC IIIA, representing the world’s advanced level.