FS ALe 642 is a class of Italian Electric Multiple Unit trains built from 1991 to 1995 for use on secondary lines and for commuter traffic.

The main differences are in the electrical part (especially traction control and low tension circuitry) and for the presence of 2nd class only seatings.

The frontal part containing cabins consists of a preformed structure made of polyester reinforced with fiberglass.

Since 2010 the ALe 642 group have received substantial upgrades in order to improve comfort and extend their service life; new modern seats were installed to replace the original ones, interior's color scheme was slightly changed, electronic screens showing trip info were also added, as well as an improved air conditioning system.

The last group of ALe 642 class was in service for the Pisa depot and performed short-range regional services in Tuscany and neighboring regions, on routes: Pisa-Pontedera, Pisa-Lucca, Lucca-Pisa-Pontedera, Lucca-Pisa-Livorno, Pisa-La Spezia, La Spezia-Parma, La Spezia-Pontremoli, Livorno-Pisa-Pontedera, Pisa-Follonica, Pisa-Piombino, Pisa-Livorno, Livorno-Cecina, Pisa-Campiglia Marittima, Pisa-Grosseto, Campiglia Marittima-Grosseto, Campiglia Marittima-Piombino Marittima, Grosseto-Orbetello, Pisa-Firenze, Pistoia-Porretta Terme, Pistoia-Firenze, Lucca-Montecatini Terme, Viareggio-Lucca-Firenze.