© trainspo.comSLM Ae 4/4
Built by SLM, BBC
Overview of the SLM Ae 4/4
Discover the robust Swiss electric locomotive, the Ae 4/4, a true workhorse of the BLS AG.
Built by SLM and BBC between 1944 and 1955, these locomotives, specifically the BLS Ae 415 class, were designed for demanding Swiss railway lines.
With a top speed of 125 km/h and a powerful 2940 kW output, the Ae 4/4 offers impressive tractive effort of 216 kN.
Its Bo'Bo' wheel arrangement and 1435 mm standard gauge make it a versatile and reliable electric locomotive.
Explore the enduring legacy of this iconic Swiss electric loco.
SLM Ae 4/4 technical specifications
| Value | Imperial / US | |
|---|---|---|
| Built by | SLM, BBC · 1944–19558 units | |
| Top speed | 125 km/h78 mph | |
| Power output | 2,940 kW3,943 hp | |
| Tractive effort | 216 kN48,559 lbf | |
| Electric systems |
| |
| Track gauge | 1,435 mmStandard gauge4 ft 8½ in | |
| UIC axle arrangement | Bo'Bo' | |
| Length | 15.6 m51 ft 2 in | |
| Weight | 80 t176,370 lb |
Operators of the SLM Ae 4/4
Railway companies that have operated the Ae 4/4, with the class designation used by each of them.
| Operator | Class | Country |
|---|---|---|
| BLS AG | BLS Ae 415 | Switzerland |
SLM Ae 4/4 photos
Photos © their respective authors, shared on trainspo.com. They may show liveries or variants that differ from the specifications above.
More electric locomotives from SLM

SLM
Re 4/4 I
Electric locomotive
1946–1951 · 125 km/h

SLM
NS 1000
Electric locomotive
1948 · 2,796 kW

SLM
BLS/BN Te 2/2
Electric locomotive
1950–1951

SLM
SBB Ae 4/6
Electric locomotive
1941–1944 · 4,080 kW

SLM
Ae 6/6
Electric locomotive
1955–1966 · 125 km/h

SLM
Re 4/4 III
Electric locomotive
125 km/h · 4,700 kW

SLM
Ae 4/7
Electric locomotive
1927–1934 · 100 km/h

SLM
MOB Ge 4/4
Electric locomotive
120 km/h · 2,000 kW
Similar electric locomotives from other manufacturers

Ansaldo
E428.226
Electric locomotive
130 km/h · 2,800 kW

ASEA
SJ F
Electric locomotive
1942–1949 · 135 km/h

ACEC
SNCB 28-0
Electric locomotive
1949 · 130 km/h

AEG
BR 194
Electric locomotive
1940–1956 · 100 km/h

Alstom
CC 7000
Electric locomotive
1949 · 140 km/h

ASEA
SJ Mg
Electric locomotive
1944–1945 · 80 km/h

AEG
DRG E94
Electric locomotive
1940–1956

GE
E60C-2
Electric locomotive
145 km/h