DBAG Class 128

128 001, as registered at Deutsche Bahn, or 12X, as named by its manufacturer AEG Schienenfahrzeuge and its successive owners ADtranz and Bombardier Transportation, is an experimental high-performance electric locomotive built in 1994, which was operated as testbed and test locomotive until 2010. The design of the locomotive featured several technological innovations, including power electronics using new types of semiconductors and water cooling, a new final drive concept, a new bogie concept, and protruding windflaps for improved aerodynamics that gave the locomotive a unique look.

DBAG Class 128
AEG/Adtranz/Bombardier 12X
128 001 in UNICEF special livery in 1996.
Type and origin
Power typeElectric
BuilderAEG Schienenfahrzeuge
Serial number22500
Model12X
Build date1994
Total produced1
RebuilderAdtranz
Rebuild date1998
Specifications
Configuration:
​
 • UICBo′Bo′
Gauge1,435 mm (4 ft 8+1⁄2 in) standard gauge
Wheel diameternew: 1,250 mm (49.2 in)
worn: 1,170 mm (46.1 in)
Wheelbasein bogie: 2,600 mm (102.4 in)
Length19,500 mm (767.7 in)
Axle load21 tonnes (23 short tons)
Loco weight85.9 t (94.7 short tons)
Electric system/soriginal:
15 kV/16.7 Hz AC catenary
after reconstruction:
15 kV/16.7 Hz and 25 kV/50 Hz AC catenary
Current pickup(s)pantograph
Traction motorsthree-phase asynchronous induction motors
type: AEG BAZu 8881/4
rating: 1,840 kW (2,470 hp)
Loco brakeregenerative, wheel tread
Performance figures
Maximum speedachieved in tests: 283 km/h (176 mph)
design: 250 km/h (155 mph)
service: 220 km/h (137 mph)
Power outputcontinuous: 6.4 MW (8,600 hp)
short-term: 7.2 MW (9,700 hp)
Tractive effortstarting:
300 kN (67,400 lbf)
continuous up to 90 km/h (56 mph):
250 kN (56,200 lbf)
Brakeforceregenerative: 250 kN (56,200 lbf)
Career
OperatorsAEG, Deutsche Bahn (lease), Adtranz, BLS (lease), DB Cargo (lease), BASF (lease), Bombardier Transportation
Class128 001-5
Official name12X
Current ownerBombardier Transportation

The development of the locomotive was initiated in anticipation of a major tender for universal locomotives by German railways, but moved towards a modular design when the railways moved towards tendering different types of locomotives for different services. The 12X was the basis of a locomotive class for medium-weight freight trains, the DBAG Class 145, the further development of which ultimately led to Bombardier's TRAXX modular locomotive product platform.

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