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| SS3B electric locomotive is an AC-DC transmission electric locomotive used for main line passenger and freight train traction of China Railway. The locomotive adopts the multiple connection of two units and the axle arrangement of 2(C0-C0). The continuous power of the locomotive is 2×4350kW, and the maximum operating speed is 100km/h. | 
| Main Technical Parameters | 
| Power Supply System | AC 25kV/50Hz | Track Gauge | 1435mm | 
| Axle Arrangement | (C0-C0)+(C0-C0) | Locomotive Service Weight | 2×138t | 
| Axle Load | 23t | Wheel Diameter | 1250mm | 
| Distance Between Loco. Front and Rear Coupler Centers | 2×21416mm | Min. Negotiable Curve Radius | 125m | 
| Max. Running Speed | 100km/h | Continuous Speed | 48km/h | 
| Max. Starting Tractive Effort | 2×470.9kN | Continuous Tractive Effort | 2×317.8kN | 
| Loco. Continuous Power | 2×4350kW | Overall Dimensions (L×W×H) | 20200mm×3100mm×4380mm (single loco.) |