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| SDD4 diesel locomotive is a broad-gauge, AC-DC electric shunting locomotive. The locomotive adopts single driver's cab and outside corridor structure, equipped with a 12V240ZJ diesel engine, with a service power of 2200KW and a maximum running speed of 100km/h. It is equipped with microcomputer control system and running safety speed monitoring system. | 
| Main Technical Parameters | 
| Application | Shunting & transfer service | Track Gauge | 1520mm | 
| Axle Arrangement | C0-C0 | Wheel Diameter | 1050mm | 
| Axle Load | 23t | Locomotive Service Weight | 138t | 
| Max. Service Output of Diesel Engine | 2000kW | Min. Negotiable Curve Radius | 100m | 
| Max. Running Speed | 100km/h | Continuous Speed | 16km/h | 
| Max. Starting Tractive Effort | 442kN | Continuous Tractive Effort | 340kN | 
| Fuel Capacity | 6200L | Oil Capacity | 1000kg | 
| Sand Capacity | 800kg | Overall Dimensions (L×W×H) | 20050mm×3300mm×4750mm |