SLM Ae 4/7

Built by BBC, MFO, SAAS, SLM

Top speed

100 km/h

62 mph

Power output

2,300 kW

3,084 hp

Length

16.76 m

55 ft 0 in

Track gauge

1,435 mm

Standard gauge

Years built

1927–1934

127 units

Overview of the SLM Ae 4/7

Discover the iconic Ae 4/7, a robust electric locomotive representing the pinnacle of Swiss engineering. Built between 1927 and 1934 by renowned manufacturers like BBC, MFO, SAAS, and SLM, this powerful machine was a cornerstone of the Swiss Federal Railways for decades.

Engineered for the demanding 1435 mm standard gauge network, the Ae 4/7 boasts a top speed of 100 km/h and an impressive power output of 2300 kW. Its 15 kV AC 16.7 Hz electric system was perfectly suited for the Swiss operational environment, ensuring efficient and reliable service across the country.

Refurbished in 1998, the Ae 4/7, with its substantial length of 16.76 meters, stands as a testament to the exceptional durability and unwavering reliability of locomotives from its era. This electric locomotive is an important piece of Swiss railway history.

SLM Ae 4/7 technical specifications

	Value	Imperial / US
Built by	BBC, MFO, SAAS, SLM · 1927–1934127 units
Refurbished	1998
Top speed	100 km/h62 mph	62 mph
Power output	2,300 kW3,084 hp	3,084 hp
Electric systems	15 kV AC 16.7 Hz
Track gauge	1,435 mmStandard gauge4 ft 8½ in	4 ft 8½ in
Length	16.76 m55 ft 0 in	55 ft 0 in
Width	2.95 m9 ft 8 in	9 ft 8 in
Height	3.8 m12 ft 6 in	12 ft 6 in