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| SDD2 diese-electric locomotive is used for mainline passenger and freight transportation on narrow gauge railway.The locomotive adopts a single driver's cab & outside corridor structure, and is equipped with a high-speed electric injection diesel engine, with service power of 1660kW and maximum running speed of 120km/h. The locomotive isequipped with microcomputer control system, multiple-unit device and resistance brake device. | 
| Main Technical Parameters | 
| Application | Main line passenger & freight transportation | Track Gauge | 1065mm | 
| Axle Arrangement | C0-C0 | Wheel Diameter | 1000mm | 
| Axle Load | 18.5t | Locomotive Service Weight | 111t | 
| Max. Service Output of Diesel Engine | 1620kW | Min. Negotiable Curve Radius | 90m | 
| Max. Running Speed | 120km/h | Continuous Speed | 18.7km/h | 
| Max. Starting Tractive Effort | 345kN | Continuous Tractive Effort | 223kN (continuous current limit) | 
| Fuel Capacity | 4500L | Oil Capacity | 360kg | 
| Sand Capacity | 640kg | Overall Dimensions (L×W×H) | 18400mm×2900mm×3950mm |