FS E.404

FS E.404
Name	FS E.404
Powertype	Electric
Builder	Società Italiana Ernesto Breda
Builddate	1970s
Gauge	1,435 mm
Tractionmotors	DC
Maxspeed	160 km/h
Operator	Ferrovie dello Stato

FS E.404 is a class of electric locomotives built for Ferrovie dello Stato in Italy during the 1970s, conceived for high-speed passenger and limited freight service on electrified mainlines. Designed by an Italian consortium, the locomotives incorporated contemporary innovations in traction control and bogie design to compete with European classes. They saw a limited production run and a specific operational niche before being superseded by newer classes.

Design and Technical Specifications

The E.404 design team drew on influences from Giovanni Agnelli, Giorgio Perlasca, AnsaldoBreda, Fiat Ferroviaria, Hitachi, and Siemens research to combine features found on FS E.444 and FS E.632 derivatives. The electrical equipment relied on rectifier technology similar to that used by SNCF and Deutsche Bahn prototypes, adopting cooling approaches used by Alstom and Marelli. Bogie geometry referenced work by Giovanni Michelotti and suspension schemes from Bombardier and Empresas Públicas de Medellín experimental rolling stock. Safety systems integrated components from SEI, RFI, ANSALDO Trasporti, and signalling standards consistent with UIC and ETCS-era protocols. The cab ergonomics were influenced by designs at Politecnico di Milano and Istituto Nazionale di Ricerca Metrologica, and interior climate systems paralleled installations in Pendolino units. Materials procurement involved suppliers such as Acciai Speciali Terni and Pirelli for traction insulators.

Development and Production

The development program engaged stakeholders including Ferrovie dello Stato, Ministero dei Trasporti, Breda, Società Italiana Ernesto Breda, Ansaldo, and academic partners at Università di Bologna, Università di Padova, and Politecnico di Torino. Funding mechanisms referenced municipal initiatives in Rome, Milan, and Turin and coordination with CNR laboratories. Prototype testing occurred on lines linking Naples Centrale, Roma Termini, and Firenze Santa Maria Novella, with trials overseen by personnel seconded from Trenitalia and technicians from RFI. Production tooling incorporated elements first used in projects with Fiat and Officine Grandi Riparazioni di Torino, while export talks involved delegations to RENFE, SBB CFF FFS, ÖBB, and SŽ.

Service History

Entry into service placed units on corridors connecting Milan Centrale, Bologna Centrale, Venice Santa Lucia, and Trieste Centrale, operating under timetables coordinated with Trenitalia intercity services and regional links administered by Regione Lombardia and Regione Veneto. Operational management involved crews trained at Scuola Trasporti Ferroviari and maintenance routines conducted at Officine FS. The class served alongside FS E.444 locomotives, multiple Electrostar-type EMUs, and diesel classes such as D.345 on non-electrified diversions. During major events like the 1980 Irpinia earthquake response, units were reassigned to relief traffic, coordinating with Protezione Civile and municipal authorities in Naples and Avellino.

Modifications and Variants

Throughout their service life, the two locomotives underwent electrical upgrades inspired by retrofits seen on SBB Re 4/4 II and DB Class 120 conversions, including modifications from Siemens and Alstom subcontractors. Bogie improvements paralleled revisions applied to FS E.646, while cab instrumentation was modernized drawing on displays used in ETR 450 and ETR 500 units. One unit received experimental traction control borrowed from development work by Westinghouse and Brown, Boveri & Cie (BBC), and another was fitted with auxiliary systems developed with Prysmian Group and Magneti Marelli.

Operations and Performance

Operational records compared performance against contemporaries such as FS E.444, FS E.633, RENFE Class 252, SBB Re 6/6, and ÖBB 1044. Timetable adherence metrics showed strengths on flat, electrified mainlines between Padua and Bologna and limitations on steep gradients near Brenner Pass routes. Fuel-independent electric traction favored interoperability with Italian Rail Network electrification at 3 kV DC; performance data were evaluated alongside rolling stock from Hitachi Rail, CAF, and Stadler. Crews cited braking characteristics akin to DB Class 103 and acceleration comparable to some InterCity locomotives in France and Spain.

Preservation and Museum Units

After withdrawal, at least one unit was earmarked for preservation by organizations including Museo Nazionale Ferroviario di Pietrarsa, Fondazione FS, and local heritage groups in Naples. Preservation efforts involved collaborations with Provincia di Napoli, Comune di Bologna, and volunteers from Associazione Nazionale della Stazione. Exhibitions planned coordination with Trenitalia and curatorial input referencing conservation projects at Science Museum, London and Deutsches Technikmuseum Berlin.

Category:Electric locomotives of Italy