Cores for the locomotives come from CP's fleet ofEMD SD40-2s. The frames, trucks, and internal components are reused while a new (standard) cab, designed and constructed by EMD, and a fuel tank is built new for each unit. With the increased emissions requirements, the locomotives feature flared radiators similar to those on theEMD SD45 to house additional cooling equipment. The locomotives have a snoot nose to house additional electronics, and all lighting with the exception of the headlights and ditch lights are LED.
A total of 50 SD30C-ECOs have been built forCanadian Pacific in 2 orders. The first order was for 20locomotives numbered 5000-5019 and the second order was for an additional 30 locomotives numbered 5020-5049.[1][2]
A similar rebuild, classed as SD40E3 was carried out by CSX in early 2017. 13 units were produced, numbered 1700-1712.[3]