FS Class D.443

Ferrovie dello Stato (FS)

Industry	Rail transport
Founded	1905 (1905)
Headquarters	Italy
Products	Railway locomotives, including Class D.443 diesel-electric locomotives

The Class D.443 diesel-electric locomotives, operated by Ferrovie dello Stato (FS), were introduced in Italy during the late 1960s and remain active in service.

History

The Italian state railway company, FS, commissioned the D.443 series alongside the D.343 locomotives, with the D.443 designed to deliver enhanced performance and versatile functionality. Both models utilized an identical chassis and single-motor bogies engineered by FS. Production was divided between manufacturers: FIAT constructed 30 units, while the remaining 20 were built by Breda. The primary objective for the D.443 was to supplant aging steam locomotives that hauled heavy freight on light, non-electrified routes.

Description

Featuring a cab at each end, the D.443's layout includes two central compartments—one housing the engine and transmission assembly, and the other containing cooling equipment. Each locomotive is equipped with two V-12 engines, each generating approximately 1,900 hp (1,400 kW), paired with a DC generator operating at 640/1080 V supplied by Ansaldo. The electric traction motors, developed by Breda, provide a continuous output of around 622 kW (834 hp).

Successors

Starting in 1974, the introduction of the D.445 series brought locomotives fitted with AC alternators and incorporated electric train heating capabilities.

Sources

• Servizio Mat. e Trazione, Automotrici termiche, Florence: Ferrovie dello Stato, 1971