ATAC S/300

S/300 is the collective name given to the MA 300 and MB 400 rolling stock operating on Lines A and B of the Rome Metro and the Rome-Lido Railway since January 2005.
==History==
The S/300 is the third and thus far most recent generation of rolling stock operated by the Rome Metro for Line A. The initial stages of the project to purchase new trains for the Rome Metro commenced in 1999 when a tender was opened for the purchase of 45 trainsets by Met.Ro; details of this tender were finalized in 2003.
The trains were built by Construcciones y Auxiliar de Ferrocarriles (CAF) at their factories in Beasain and Zaragoza; these were the first rolling stock on the network to not be built by an Italian-based company. The first trains, classified as MA 300, arrived in January 2005 and began service on Line A thereafter, followed by entrance into service on Line B and after further technical modifications on the Rome-Lido Railway. By 2009 53 trains had been built. With the introduction of the MA 300s all MA 100 and MA 200s were progressively withdrawn and redeployed on the Rome-Lido Railway.
A second batch of 18 trains was manufactured from 2014 to 2015, ordered by ATAC, Met.Ro's successor; this made the S/300 fleet consist of 71 trainsets. This second batch was classified as the MB 400 and entered service on Line B in 2014. When originally introduced, MA.301/MA.302 through MA.377/378 were used Line A, MA.379/MA.380 through MA.389/MA.390 were used on the Rome-Lido Railway and MA.391/MA.392 to MA.405/MA.406 were used on Line B, while all MB 400 trains operate only on Line B; since then there have been a number of train movements with a number of Line A's MA 300 fleet moved over to the Rome-Lido Railway or Line B.
==Design==
Car bodies are constructed of an aluminum alloy following in the veins of the MB 100 sets; it is part of CAF's Inneo series of trains. Each set consists of six cars, comprising of two control cab cars and four powered intermediate cars. Each car has four doors per side and open gangways following in the vein of the MA 200 sets they replaced; similar to the MA 200s, each set is semi-permanently coupled to each other and cannot be split apart without the use of specialist equipment available in depots. Shock absorbers are present between the cars and on each of the cabs acting as buffers.
There are minor differences between the MA 300 and MB 400 cars, mostly in terms of the configuration of the couplers and pantographs. Many of these sets are often found vandalized with graffiti.
==Specifications==
The S/300s use a CAF-manufactured IGBT variable frequency drive system; this is a similar system used on a number of trains in Spain, particularly on the Madrid Metro as seen on their Series 3000 trainsets.
==Incidents==
MA.329/MA.330 was involved in an accident in 2015 and scrapped as a result.
Category:Electric trainsets
Category:CAF locomotives
Category:ATAC locomotives
Category:Rome Metro locomotives