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SNCF Class B 81500, an example of an electro-diesel multiple unit
SNCF Class B 81500, an example of an electro-diesel multiple unit

An electro-diesel multiple unit (EDMU) or bi-mode multiple unit (BMU) is a form of a multiple unit that can be powered either by electric power picked up from the overhead lines or third rail (like an electric multiple unit – EMU) or by using an onboard diesel engine, driving an electric generator, which produces AC or DC electric power (like a diesel-electric multiple unit – DEMU).[1][2]

List of BMUs

This section needs expansion. You can help by adding to it. (September 2019)



Two variants of the China Railway CR200J-SG Fuxing (HXD1D-J and FXN3-J) high-speed train are electro-diesel (bi-mode) multiple units specifically designed for plateau operation. They are HXD1D-J manufactured by CRRC Zhuzhou Locomotive and FXN3-J manufactured by CRRC Dalian. Two variants are served on Sichuan–Tibet railway.[3]



NSW TrainLink Regional Train Project is building 117 bi-mode carriages (1.5 kV DC) to replace its diesel fleet of interstate and regional XPT, Xplorer and Endeavour trainsets to be delivered by CAF from 2023.



SNCF B 82500 BMU

Bombardier has built dual-mode variants of its AGC series[4] for the French operator SNCF; the electricity is collected by means of a pantograph.




EN63H West Pomerian Voivodeship exploited by Porlegio.
EN63H West Pomerian Voivodeship exploited by Porlegio.


United Kingdom

British Rail Class 802

Electro-diesel multiple units whose electricity source is 25 kV 50 Hz AC overhead line include:

See also


  1. ^ "[UK] Greater Anglia: First FLIRT UK on the tracks for testing". Railcolornews. 15 May 2018.
  2. ^ "Bi-mode multiple unit – FLIRT" (PDF). Stadler. The bi-mode units enable an interruption-free service on electrified and non-electrified lines. The necessary power is generated by diesel engines[…]. When running under catenary the diesel engines can be shut off
  3. ^ "秦岭山间舞小青——内电双源高原动车组宝天铁路精彩亮相". (in Chinese). 14 May 2021. Retrieved 13 April 2022.
  4. ^ "MITRAC Hybrid The Dual Power Propulsion Chain" (PDF). Bombardier.
  5. ^ (in Italian) it:Treno Bimodale Stadler BTR.813
  6. ^ "First electro-diesel Flirts ordered".
  7. ^ "Bi-mode Multiple Unit – FLIRT Nordic" (PDF). Stadler Rail.
  8. ^ "[NO / Expert] Bi-mode Flirt for Norske Tog leaving the Stadler factory [updated]". 28 September 2020.
  9. ^ "Hybrid Multiple Unit | NEWAG SA". Newag. Retrieved 14 July 2021.
  10. ^ ms (21 January 2021). "Pierwszy dwunapędowy Impuls 2 pojechał z pasażerami [zdjęcia]" [First bi-mode Impuls 2 carried passengers [photos]]. Rynek Kolejowy (in Polish). Retrieved 14 July 2021.
  11. ^ Roden, Andy (8 October 2016). "New trains as Abellio scoops East Anglia franchise". Rail.
  12. ^ Government gives green light for more state-of-the-art intercity trains, Department for Transport, 18 July 2013