Hamburg U-Bahn Type DT4

The Type DT4 is a four-car electric multiple unit (EMU) train type operated by the Hamburger Hochbahn AG on the Hamburg U-Bahn system since 1988.

HHA-Baureihe DT4
DT4 U-Bahn U4 Überseequartier - 3928-df3.jpg
A DT4 train at Überseequartier station in May 2013
In service1988–
ManufacturerLHB, ABB
Number built126 units
Number in service126 units
Fleet numbers101–226
Capacity182 seated
Operator(s)Hamburger Hochbahn AG
Depot(s)Farmsen, Barmbek
Train length60.28 m (197 ft 9 in)[1]
Width2.58 m (8 ft 6 in)[1]
Height3.32 m (10 ft 11 in)[1]
Doors2 pairs per side (per car)
Maximum speed80 km/h (50 mph)
Weight76.8 t (75.6 long tons; 84.7 short tons)[1]
Traction systemThree-phase asynchronous (two motors per powered bogie)
Power output1,000 kW (1,340 hp)
Electric system(s)750 V DC third rail
Current collection methodContact shoe
UIC classificationBo′2′Bo′+Bo′2′Bo′
Braking system(s)Dynamic main brakes, automatic air brakes
Safety system(s)Sifa
Track gauge1,435 mm (4 ft 8 12 in)


Every DT4 train consists of four cars, which are formed as two articulated half-sets with two cars each. The cars don't have gangways, but feature windows in the inner car ends.[2]


The interior consists of transverse seating bays.[2] Widescreen passenger information displays are to be fitted to the whole DT4 fleet, with works scheduled to be completed in 2022.[3]

Technical specificationsEdit

The trains have steel car bodies and a three-phase propulsion system.[2] Thyristor inverters are used in the DT4.1 and DT4.2 trains, and the DT4.3 through DT4.5 trains use GTO-pulse inverters.[2] The DT4.56 and DT4.6 trains use IGBT-pulse inverters.[2]

Each four-car set has four powered bogies and two non-motored jacobs bogies. The powered bogies are equipped with water cooled three-phase asynchronous motors.[2]


The development of the DT4 began in 1986, and the first unit was completed on May 30, 1988.[citation needed] Passenger service began on October 17 of the same year.[citation needed]

The DT4 trains are being refurbished since 2011.[citation needed] They receive a newer interior appearance, similar to the interior of the DT5 trains. One car of set 140 was refurbished for testing purposes in summer 2010.[citation needed] Regular refurbishment started in 2011.[citation needed]


  1. ^ a b c d Schleife W.; et al. (1992). Metros der Welt [Metros of the world] (in German) (2nd ed.). Berlin: transpress Verlagsgesellschaft. p. 142. ISBN 3-344-70715-9.
  2. ^ a b c d e f Pabst, Martin (2006). S-Bahn- und U-Bahn-Fahrzeuge in Deutschland [S-Bahn and U-Bahn vehicles in Germany] (in German) (2nd ed.). GeraMond. pp. 62–63. ISBN 3-7654-7366-9.
  3. ^ "Mehr Fernsehen in Hamburgs Zügen - Hochbahn baut Unterhaltungs-Angebot aus" [More television on Hamburg's trains - Hochbahn is expanding its entertainment service]. Hamburger Morgenpost (in German). November 1, 2019. Archived from the original on January 5, 2020. Retrieved January 5, 2020.

External linksEdit