SIG FO Deh 4/4 I

Built by BBC, SIG, SLM

Top speed

60 km/h

37 mph

Power output

1,032 kW

1,384 hp

Weight

48.3 t

106,483 lb

Length

16.9 m

55 ft 5 in

Track gauge

1,000 mm

Metre gauge

Years built

1972

5 units

Overview of the SIG FO Deh 4/4 I

Discover the FO Deh 4/4 I, a powerful electric locomotive designed for challenging mountain railways.

Built in 1972 by BBC, SIG, and SLM, this robust locomotive has a long service history with the Furka Oberalp Bahn (FO) and later the Matterhorn-Gotthard-Bahn (MGB).

With a power output of 1032 kW and a tractive effort of 118 kN, the FO Deh 4/4 I is well-equipped for demanding routes. Its 1000 mm gauge and a top speed of 60 km/h make it a valuable asset for both freight and passenger transport in tough terrains.

Weighing 48.3 tonnes and measuring 16.9 meters in length, this locomotive is a testament to Swiss engineering excellence in railway technology. Its 11 kV AC 16.7 Hz electric system ensures efficient operation across Swiss rail networks.

SIG FO Deh 4/4 I technical specifications

	Value	Imperial / US
Built by	BBC, SIG, SLM · 19725 units
Top speed	60 km/h37 mph	37 mph
Power output	1,032 kW1,384 hp	1,384 hp
Tractive effort	118 kN26,527 lbf	26,527 lbf
Electric systems	11 kV AC 16.7 Hz
Track gauge	1,000 mmMetre gauge3 ft 3⅜ in	3 ft 3⅜ in
UIC axle arrangement	Bo'zz Bo'zz
Length	16.9 m55 ft 5 in	55 ft 5 in
Weight	48.3 t106,483 lb	106,483 lb