Bombardier's TRAXX brand name was introduced in 2003, officially standing for Transnational Railway Applications with eXtreme fleXibility.
The concept dates bate a few years earlier: a generic modular product platform of electric and diesel-electric mainline locos built in freight and passenger variants. The first version was a dual voltage AC locomotive built from 2000 for the Deutsche Bahn (German railways); later versions include DC versions, as well as quadruple voltage machines, able to operate on most European electric lines, involving 1.5 and 3.0 kV DC and 15 and 25 kV AC. The family was expanded to include diesel powered versions in 2006. Elements common to all variants include the steel bodyshells, the two bogies with two powered axles each, the three-phase asynchronous induction motors, the cooling exhausts on the roof edges, and the wheel disc brakes.
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