loco-info.com
The reference for locomotives and railcars
Navigation
Random
Search
Compare
Settings

Navigation

Page views since 2023-01-26: 317469
German Federal Railway class 420
Germany | 1969 | 480 produced
420 001 still in Bundesbahn livery
420 001 still in Bundesbahn livery
Michael Heimerl

Towards the end of the 1960s, the Bundesbahn had the first S-Bahn multiple-unit train developed for alternating current networks, which was initially to run as the ET 20 with middle cars designated as the ET 21. The first services were to take place at the 1972 Summer Olympics in Munich. The first trains were given the class numbers 420 and 421 when they were put into service.

Each train consisted of three cars that had no gangways between them. In the middle car there was a first-class compartment, which was later either halved or completely replaced by second-class due to lack of demand. The sets could be coupled to form longer trains with little effort using Scharfenberg couplings. From the start, the middle cars were made of aluminum, and later the end cars were also made of aluminum instead of steel. All axles of the three cars were driven by nose-suspended motors and controlled by thyristors. Braking was usually electric and air brakes were only supplementary.

The production of the total of 480 sets was carried out by several manufacturers and lasted for a period of 28 years. These trains were used on virtually all West German S-Bahn networks that are electrified with the usual AC system via overhead lines and do not have their own DC system via third rail. In addition to Munich, these were also the S-Bahns Rhein-Ruhr, Rhein-Main, Frankfurt and Stuttgart.

The points of criticism of the trains that were repeatedly cited were that there were no gangways between the cars, the individual sets always had to be used with three carsand there were no toilets for longer sections. For this reason, some trains of the Rhine-Ruhr S-Bahn were handed over to Munich as early as 1980.

The class 420 trains were partly replaced by locomotive-hauled trains, but mostly by class 422, 423 and 430 multiple units. Some trains which had already been decommissioned were handed over to other regions when there was additional demand there. Some trains were used from 2002 in the Stockholm area as SL X420 and were scrapped in 2005. In 2006, two trains were upgraded inside and out as “ET 420 Plus”, but no other trains were converted. Although some are still in use today, 400 of the 480 sets have already been scrapped.

General
Built1969-1997
ManufacturerMAN, WMD Donauwörth, LHB, MBB, O&K, DUEWAG, Waggon-Union, Rathgeber
Axle configB-B+B-B+B-B 
Gauge4 ft 8 1/2 in (Standard gauge)
Seats192
Dimensions and Weights
Length221 ft 1 9/16 in
Wheelbase62 ft 4 1/16 in
Fixed wheelbase8 ft 2 7/16 in
Empty weight284,396 lbs
Service weight317,465 lbs
Adhesive weight317,465 lbs
Axle load26,455 lbs
Power
Power sourceelectric - AC
Electric system15.000 V 16⅔ Hz
Hourly power3,218 hp (2,400 kW)
Top speed75 mph
Power Plant
Boiler
Calculated Values
EMU
suburban
local
last changed: 01/2023
loading...

We use cookies to save the following settings:

  • selected navigation structure
  • selected language
  • preferred units
  • spelling of railway company names

If you refuse the use of cookies, the settings will only be retained for the current session and will be reset to the default values the next time you visit the site.

Display of units

Here you can set the desired unit system for the technical data.

  • Metric: Lengths in meters, weights in tonnes, and volumes in cubic meters
  • Imperial (UK): Lengths in feet/inches, weights in long tons and volumes in imperial gallons
  • Imperial (US): Lengths in feet/inches, weights in pounds, and volumes in US gallons
  • Individual: Depends on the country of origin of each locomotive
Operator names

Here you can set the display of railway company names.

  • Short: Abbreviation or short form of the name
  • Standard: commonly used name, partially translated to English
  • Complete: full name in local language