© trainspo.comSIG BCFm 2/4
Built by MFO, SIG, Sulzer
Overview of the SIG BCFm 2/4
Explore the historic BCFm 2/4 locomotive, a charming piece of Swiss railway heritage from the Appenzeller Bahnen.
Built in 1929 by MFO, SIG, and Sulzer, this diesel multiple unit (DMU) offers a glimpse into early 20th-century rail technology.
With a top speed of 45 km/h and a capacity for 30 seats, the BCFm 2/4 is designed for regional routes, featuring a standard gauge of 1435 mm.
Its compact dimensions, with a car length of 16.4 meters, width of 2.7 meters, and height of 3.68 meters, make it well-suited for scenic journeys.
Weighing 32 tons and powered by a 150 kW output, this locomotive embodies a rich operational history in Switzerland.
SIG BCFm 2/4 technical specifications
| Value | Imperial / US | |
|---|---|---|
| Built by | MFO, SIG, Sulzer · 1929 | |
| Top speed | 45 km/h28 mph | |
| Power output | 150 kW201 hp | |
| Track gauge | 1,435 mmStandard gauge4 ft 8½ in | |
| Capacity | 30 seats | |
| Car length | 16.4 m53 ft 10 in | |
| Width | 2.7 m8 ft 10 in | |
| Height | 3.68 m12 ft 1 in | |
| Weight | 32 t70,548 lb |
Operators of the SIG BCFm 2/4
Railway companies that have operated the BCFm 2/4, with the class designation used by each of them.
| Operator | Class | Country |
|---|---|---|
| Appenzeller Bahnen | AB BCFm 2/4 | Switzerland |
Other SIG models

SIG
Bernmobil Bre 4/4
Tram
35 km/h · 125 kW

SIG
RBS Be 4/4 71
Electric multiple unit
1925

SIG
BLS De 4/5
Electric multiple unit
1929 · 90 km/h

SIG
VRB BDhe 4/4
Electric multiple unit
25 km/h · 752 kW

SIG
SBB De 4/4
Electric locomotive
1928 · 85 km/h

SIG
VHB De 4/4
Electric locomotive
1933 · 80 km/h

SIG
Bernmobil Be 4/4
Tram
1935–1936

SIG
BT BDe 2/4
Electric multiple unit
1932 · 90 km/h
Similar diesel multiple units from other manufacturers

Stadler
GTW 2/6 - BR 646.1
Diesel multiple unit
420 kW

FAUR
CFR 78.1
Diesel multiple unit
1940–1944 · 100 km/h

Bombardier
ZSSK 840
Diesel multiple unit
115 km/h · 500 kW

Bombardier
Talent 3-part DMU
Diesel multiple unit
120 km/h · 630 kW

Siemens
Desiro Classic DMU
Diesel multiple unit
120 km/h · 630 kW

Allan
NS DE3 / Mat '34
Diesel multiple unit
1933 · 125 km/h

FHI
KiHa 65-700
Diesel multiple unit
95 km/h

Niigata Transys
JR Kyushu KiHa 125
Diesel multiple unit
95 km/h