Units hired from Alpha Trains cargo to SNCB (Belgium) have also received the class number SNCB Class 28 In July 2018, Bombardier introduced the third generation of TRAXX multi-system locomotives, named the MS3, which in addition to carrying over compatibility with the four electrification systems introduced an onboard engine to enable travel over short distances of non-electrified track. TRAXX DC versions Once Bombardier completed the first TRAXX F140 MS, a single-voltage version for DC overhead wires could be produced cost effectively by leaving away the AC equipment of a multi-system locomotive, and Bombardier began seeking a launch customer in 2004. In 2005, Angel Trains (today Alpha Trains) placed an order for 10 DC electric locomotives with Bombardier. The first machine, designated E483 001, was produced in August 2006 at Bombardier's plant in Kassel. Later machines were built at Bombardier's plant in Vado Ligure in Italy, which has become the official site for production of DC versions of the TRAXX locomotives. The weight of the TRAXX F140 DC is slightly reduced compared to the AC machines which require a particularly heavy high-voltage transformer for use with the low 16.7 Hz frequency of the 15 kV AC system. The machines are built to the same specifications as the rest of the TRAXX family, but only have equipment for 3 kV DC - making them suitable for internal work in Italy, Spain and Poland. If necessary the machines can be rebuilt for multi-system use. Renfe Mercancías, the freight division of Renfe Operadora ordered 100 locomotives for freight use to be designated RENFE Class 253; these are the first TRAXX locomotives to be built to anything other than standard gauge. Additionally Trenitalia has ordered 42 locomotives for freight use, which will be operated at up to 160 km/h. TRAXX diesel versions The diesel version of the TRAXX platform was introduced with the 2E version of the TRAXX platform. In the diesel version, the fuel tank occupies the same space as the transformer in the electric versions, centrally and below the main frame members. Installed motor power is 2.2MW. The diesel and electric TRAXX locomotives share the same driver cabin and control desk, body, bogies, and drive system. The maximum tractive effort is slight reduced by 30 kN to 270 kN due to the lower power of the diesel engine. The first order for the diesel passenger version (designated as Class 246, Bombardier's designation TRAXX