Buenos Aires Underground 100 Series

100 Series
A 100 Series train on Line D, before mid-life refurbishment
In service2001-Present
ManufacturerAlstom
Family nameAlstom Metropolis
ReplacedLa Brugeoise cars
Siemens O&K
Caf Gee
Constructed2001-2009
Entered service2001
Refurbished2015
Number built96
Number in service96
Formation6 cars per trainset
OperatorsBuenos Aires Underground
Lines served
Specifications
Car body constructionStainless steel
Doors4 per side
Traction systemAlstom ONIX 1500
IGBT-VVVF
Track gauge1,435 mm (4 ft 8+12 in) standard gauge

The 100 Series are a series of underground railway cars manufactured by Alstom in Brazil and Argentina for use on the Buenos Aires Underground. They are used on Line D of the network, where they make up the vast majority of the fleet, serving alongside some 300 Series and Fiat-Materfer cars. Since 2019, some units have also been used on the Line E.