EMD DDA40X

Built by EMD

Power output

4,920 kW

6,598 hp

Length

30 m

98 ft 5 in

Track gauge

1,435 mm

Standard gauge

Years built

1969–1971

47 units

Axle arrangement

Do'Do'

Overview of the EMD DDA40X

Discover the mighty DDA40X locomotive, a legendary diesel powerhouse operated by the Union Pacific Railroad.

This impressive machine, also known as the "Centennial" due to its production year, was one of the largest and most powerful diesel locomotives ever built.

With its distinctive D8-40X configuration, the DDA40X is a true icon of American railroading history, embodying strength and endurance.

Explore the specifications and history of this remarkable locomotive and its significant role in freight transportation.

EMD DDA40X technical specifications

	Value	Imperial / US
Built by	EMD · 1969–197147 units
Power output	4,920 kW6,598 hp	6,598 hp
Prime mover	EMD 16-645E3A
Track gauge	1,435 mmStandard gauge4 ft 8½ in	4 ft 8½ in
UIC axle arrangement	Do'Do'
Length	30 m98 ft 5 in	98 ft 5 in
Width	3.15 m10 ft 4 in	10 ft 4 in
Height	4.98 m16 ft 4 in	16 ft 4 in