SLM Re 4/4 II

Built by SLM, BBC, MFO, SAAS

Top speed

140 km/h

87 mph

Power output

4,700 kW

6,303 hp

Weight

80 t

176,370 lb

Length

15.41 m

50 ft 7 in

Track gauge

1,435 mm

Standard gauge

Years built

1967–1985

277 units

Overview of the SLM Re 4/4 II

Discover the Re 4/4 II, a powerful electric locomotive renowned for its Swiss engineering and versatility. Built between 1967 and 1985 by SLM, BBC, MFO, and SAAS, this iconic train boasts a 4700 kW power output, enabling it to reach speeds of up to 140 km/h.

Operating on 15 kV AC 16.7 Hz electric systems, the Re 4/4 II is a reliable workhorse. With a length of 15.41 meters and a weight of 80 tons, its Bo'Bo' wheel arrangement provides excellent tractive effort of 255 kN, making it suitable for both freight and passenger services.

Known also as the Re 420 or Re 421, this locomotive has a long and distinguished service history with numerous railway companies across Switzerland and Germany, including Swiss Federal Railways, SBB Cargo, BLS AG, and HSL Logistik. Its robust design and consistent performance have cemented its status as a staple in European rail operations.

SLM Re 4/4 II technical specifications

	Value	Imperial / US
Series	Re 4/4 II
Built by	SLM, BBC, MFO, SAAS · 1967–1985277 units
Top speed	140 km/h87 mph	87 mph
Power output	4,700 kW6,303 hp	6,303 hp
Tractive effort	255 kN57,326 lbf	57,326 lbf
Electric systems	15 kV AC 16.7 Hz
Track gauge	1,435 mmStandard gauge4 ft 8½ in	4 ft 8½ in
UIC axle arrangement	Bo'Bo'
Length	15.41 m50 ft 7 in	50 ft 7 in
Width	2.97 m9 ft 9 in	9 ft 9 in
Height	4.5 m14 ft 9 in	14 ft 9 in
Weight	80 t176,370 lb	176,370 lb

Source of the data: en.wikipedia.orgView this model on trainspo.com Spotted an error? Let us know

Operators of the SLM Re 4/4 II

Railway companies that have operated the Re 4/4 II, with the class designation used by each of them.

Operator	Class	Country
Steiermarkbahn Transport and Logistik GmbH	STB 421	Austria
HSL Logistik	HSL 421	Germany
Mittelweserbahn	MWB Re 421	Germany
TXLogistik	TXL 421	Germany
Unternehmen Umwelt- und Transportlogistik	UTL Re 421	Germany
BLS AG	BLS Re 420	Switzerland
Dampflok Depot Full	DDF 421	Switzerland
International Rolling Stock Investment	IRSI Re 421	Switzerland
RailCare AG	railCare Re 4/4 II	Switzerland
SBB Cargo	SBB Cargo Re 420	Switzerland
SBB Cargo	SBB Cargo Re 421	Switzerland
Swiss Federal Railways	SBB Re 420	Switzerland
TR Trans Rail AG	Transrail Re 421	Switzerland
WRS Widmer Rail Services Personal AG	WRSCH Re 420	Switzerland
WRS Widmer Rail Services Personal AG	WRSCH Re 421	Switzerland