CFL Class 4000

{{More citations needed|date=August 2008}}

{{Infobox locomotive

|name = Class 4000

|powertype = Electric

|image = CFL 4015.jpg

|caption = CFL loco 4015 in Luxembourg station, 2 June 2007.

|builder = Bombardier

|builddate = 2004–2005

|totalproduction = 20

|aarwheels = B-B

|uicclass = Bo′Bo′

|gauge = {{track gauge|1435mm}}

|length = {{convert|18.9|m|ftin|0|abbr=on}}

|axleload = {{convert|21|t}}

|locoweight = {{convert|84|t}}

|electricsystem = 25 kV 50 Hz AC
{{15 kV AC}}

|collectionmethod = Pantograph

|maxspeed = {{convert|140|km/h|mph|0|abbr=on}}

|poweroutput = {{convert|5600|kW|hp|abbr=on}}

|operator = CFL

|operatorclass = 4000

|numinclass = 20

|fleetnumbers = 4001–4020

|officialname = TRAXX

|locale = Luxembourg

|deliverydate = 2004-2005

|disposition = in service

}}

The CFL class 4000 is a variant of the Bombardier TRAXX locos found working across Europe. Within Luxembourg they work on the local passenger services, crossing the borders into France or Belgium as necessary. They also work freight traffic. Their 15 kV capability allows them to work across the border to Germany. Even though they are capable of running in France, they are not allowed to do so for security reasons.{{clarify|date=April 2018}}

Their slab sided body work has been used for advertising.

Along with the Bombardier bilevel cars that they pull, the Class 4000 are due to be replaced by electric multiple units by 2030.{{Cite web |title=Les CFL veulent acheter plus d’une vingtaine de nouveaux trains |url=https://www.virgule.lu/luxembourg/les-cfl-veulent-acheter-plus-d-une-vingtaine-de-nouveaux-trains/32951250.html |last=Schwaller |first=Glenn |date=2025-01-06 |website=virgule.lu}}