[7][8] These trainsets, each comprising seven cars, were built to PKP Intercity's individual specifications; whilst capable of attaining a maximum speed of 250 km/h, carrying up to 402 passengers, and incorporating various noise minimisation measures, they intentionally excluded the optional tilting mechanism.

[12] On 11 September 2014, Polands's Railway Transport Office (UTK) announced that the ED250 had been certified for operation at up to 250km/h in accordance with the relevant Technical Specifications for Interoperability (TSI).

[13][14] They are operated on existing conventional lines between major city groups such as Warsaw-Gdansk-Gdynia, Warsaw-Krakow, and Warsaw-Katowice, delivering significantly shortened journey times over traditional rolling stock, traversing the route between Warsaw and Gdansk in two and a half hours.

[9] In the 2020/21 timetable, ED250 routinely operated at a scheduled speed of up to 200 km/h (124 mph) along selected stretches of the Warszawa - Gdynia and Central Rail Line routes.

[15] Various other schemes were underway during the late 2010s, such as the retrofitting of Wi-Fi apparatus throughout the various types of rolling stock to provide passengers with mobile internet access, having completed work on 171 PKP Intercity cars and 40 combined sets by August 2018.

[16] One year later, a contract valued at €247 million was issued by PKP Intercity to the Swiss rolling stock manufacturer Stadler Rail for the manufacture and delivery of 12 Stadler FLIRT electric multiple units in an eight-car long configuration as well as a 15-year maintenance period; these feature both first class and second class compartments along with an onboard lounge bar area and accessibility adaptions for persons of reduced mobility.