| WAG-12B |
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| Type and origin |
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| Power type | Electric |
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| Designer | Alstom & RDSO |
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| Builder | ELF, Madhepura |
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| Build date | 2017 (2017)–present |
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| Total produced | 520 as of June 2025 |
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| Specifications |
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Configuration:
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| • AAR | B-B+B-B |
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| • UIC | Bo′Bo′+Bo′Bo′ |
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| • Commonwealth | Bo-Bo+Bo-Bo |
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| Gauge | 5 ft 6 in (1,676 mm) Indian gauge |
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| Wheel diameter | 1,250 mm (4 ft 1 in) |
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| Wheelbase: | |
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| • Bogie | 2,600 mm (8 ft 6 in) |
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| Pivot centres | 10,200 mm (33 ft 6 in) |
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| Panto shoes | 9,000 mm (29 ft 6 in) |
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Length:
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| • Over couplers | 38,400 mm (126 ft 0 in) |
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| Width | 3,215 mm (10 ft 7 in) |
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Height:
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| • Pantograph | 4,245 mm (13 ft 11 in) |
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| Axle load | 22.5t (upgradable to 25t) |
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| Loco weight | 180t (upgradable to 200t) |
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| Electric system/s | 25 kV 50 Hz AC |
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| Current pickup(s) | Pantograph |
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| Traction motors | 6FRA-4576D, Asynchronous, Forced Cooled, Nose Suspended |
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| • Continuous | 1125 kW @ 1750 rpm |
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| Gear ratio | 110:23 |
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| MU working | 2 units |
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| Loco brake | Air, Regenerative |
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| Train brakes | Air |
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| Couplers | CBC coupler, Buffers and chain coupler |
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| Performance figures |
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| Maximum speed | 100 km/h (62 mph)
(Upgradable to 120 km/h) |
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Power output:
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| • Continuous | 9,000 kW (12,000 hp) |
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Tractive effort:
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| • Starting | 612 kN (137,583 lbf)
(Upgradable to 785 kN) |
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| Brakeforce | 634.5 kN (142,641 lbf) |
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| Career |
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| Operators | Indian Railways |
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| Numbers | 60001+ onwards |
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| Locale | India |
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| Delivered | 11 October 2017 |
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| First run | 19 May 2020 |
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The Indian locomotive class WAG-12B is a class of 25 kV AC twin section electric locomotives that was developed in 2017 by Alstom with technological collaboration with Indian Railways. The model name stands for wide gauge (W), alternating current (A), goods traffic (G) locomotive-12. They entered trial service in 2019. As June 2025, a total of 520 WAG-12B were built at the Electric Locomotive Factory, Madhepura, Bihar, India.
With a power output of 12,000 hp, the WAG 12 is twice as powerful as its immediate predecessor, WAG-9. The locomotive was developed for use on dedicated freight corridors, where it is used to haul freight trains weighing more than 6,000 tonnes (5,900 long tons; 6,600 short tons) at speeds of 100 km/h (62 mph) to 120 km/h (75 mph), doubling the average speed of freight trains in the sector.
