© trainspo.comSWP TMR BDeh 4/4
Built by SAAS, SWP
Overview of the SWP TMR BDeh 4/4
Discover the TMR BDeh 4/4, an iconic Swiss electric multiple unit that has been a staple of regional transport.
Built between 1957 and 1964 by SAAS and SWP, this 1000 mm gauge unit served faithfully with Transports de Martigny et Régions SA.
With a top speed of 50 km/h and a weight of 37.9 tons, the TMR BDeh 4/4 embodies the efficiency and reliability of Swiss regional transport.
Its Bo'zz Bo'zz axle configuration and 18-meter length make it a familiar and valued presence on Swiss railway lines.
Powered by an 830 V DC electric system, it stands as a testament to enduring railway engineering.
SWP TMR BDeh 4/4 technical specifications
| Value | Imperial / US | |
|---|---|---|
| Built by | SAAS, SWP · 1957–1964 | |
| Top speed | 50 km/h31 mph | |
| Electric systems |
| |
| Track gauge | 1,000 mmMetre gauge3 ft 3⅜ in | |
| UIC axle arrangement | Bo'zz Bo'zz | |
| Car length | 18 m59 ft 1 in | |
| Weight | 37.9 t83,555 lb |
Operators of the SWP TMR BDeh 4/4
Railway companies that have operated the TMR BDeh 4/4, with the class designation used by each of them.
| Operator | Class | Country |
|---|---|---|
| Transports de Martigny et Régions SA | TMR BDeh 4/4 | Switzerland |
More electric multiple units from SWP

SWP
ABe 8/8
Electric multiple unit
1959 · 60 km/h

SWP
SAD BDe 4/8
Electric multiple unit
65 km/h · 400 kW

SWP
FART ABDe 6/6
Electric multiple unit
1963 · 60 km/h

SWP
BDeh 4/4
Electric multiple unit
1964–1980 · 75 km/h

SWP
FLP ABe 4/6 - SSIF ABe 6/6
Electric multiple unit
1968 · 60 km/h

SWP
CEV BDeh 2/4
Electric multiple unit
1970

SWP
WB BDe 4/4
Electric multiple unit
1986–1993 · 75 km/h

SWP
RBDe 4/4
Electric multiple unit
1982–1992 · 125 km/h
Similar electric multiple units from other manufacturers

Carminati
FGC A4-A7
Electric multiple unit
1957 · 60 km/h

SWS
BDWM BDe 4/4
Electric multiple unit
43 km/h · 216 kW

BBC
RhB ABDe 4/4
Electric multiple unit
1957–1958 · 65 km/h

BBC
BCFeh 4/4
Electric multiple unit
40 km/h · 440 kW

Mitsubishi
Yurikamome 7000
Electric multiple unit
60 km/h

OMS
ET007-008
Electric multiple unit
1955–1956 · 640 kW

Tokyu Car
YNT 2000
Electric multiple unit
60 km/h

MFO
FB BDe 4/4
Electric multiple unit
1959–1966 · 65 km/h