FS Class E.646

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FS class E.646
E.646 in original livery
Type and origin Power type Electric Builder TIBB Build date 1958-1967
Specifications Configuration: ​  • UIC Bo-Bo-Bo Wheel diameter 1.250 m (49.21 in) Wheelbase 13.550 m (44 ft 5+1⁄2 in) between bogie pivots 2.850 m (9 ft 4+1⁄4 in) between axles on each bogie Length 18.290 m (60 ft 1⁄8 in) Width 3.013 m (9 ft 10+5⁄8 in) Height 4.296 m (14 ft 1+1⁄8 in) Loco weight 110–112 t (108–110 long tons; 121–123 short tons) Electric system/s 3,000 V DC Catenary Current pickup(s) Pantograph Traction motors DC Transmission 25/64 gear ratio Loco brake Oerlikon FV4 Safety systems RSC4; some units (about 40) have also been fitted with SCMT
Performance figures Maximum speed 140 km/h (87 mph) Power output hourly: 4,320 kW (5,790 hp) - continuous: 3,780 kW (5,070 hp) Tractive effort 233 kN (52,000 lbf)
Career Operators FS Trenitalia Number in class 198 First run 1958 Disposition Decommissioned in 2009

The FS E.645 and E.646 are two classes of similar electric locomotives used on Italian railways. They were introduced during the 1950s and they were retired in 2009.