D-class Melbourne tram

D-class
D2 5016 at the Elizabeth Street terminus, February 2023
Refurbished interior with seating
Manufacturer	Siemens
Built at	Uerdingen, Krefeld, Germany
Family name	Combino
Constructed	2002-2004
Number built	59
Number in service	59
Fleet numbers	D1 3501–D1 3538 D2 5001–D2 5021
Capacity	D1: 32/90 D2: 56/130 (seated/standing)
Depots	Brunswick Malvern
Specifications
Train length	D1: 20.04 m (65 ft 9 in) D2: 29.85 m (97 ft 11 in)
Width	2.65 m (8 ft 8 in)
Height	D1: 3.65 m (12 ft 0 in) D2: 3.53 m (11 ft 7 in)
Doors	2 single, 4 (D1) or 6 (D2) double
Articulated sections	D1: 3 (2 articulations) D2: 5 (4 articulations)
Wheel diameter	600–520 mm (24–20 in) (new–worn)[1]
Wheelbase	1.8 m (5 ft 11 in)
Maximum speed	70 km/h (43 mph)[1]
Weight	D1: 25.8 t (25.4 long tons; 28.4 short tons) D2: 35.3 t (34.7 long tons; 38.9 short tons)
Traction motors	4 × Siemens 1TB1422-0GA03[2] 100 kW (130 hp)
Power output	400 kW (536 hp)
Acceleration	1.3 m/s2 (2.9 mph/s)
Deceleration	1.61 m/s2 (3.6 mph/s) (Max D1 operational) 1.47 m/s2 (3.3 mph/s) (Max D2 operational) 1.35 m/s2 (3.0 mph/s) (Average D1 operational) 1.25 m/s2 (2.8 mph/s) (Average D2 operational) 3.4 m/s2 (7.6 mph/s) (Max D1 emergency) 3.3 m/s2 (7.4 mph/s) (Max D2 emergency) 2.74 m/s2 (6.1 mph/s) (Average D2 emergency) [2]
Electric system(s)	600 V DC (nominal) from overhead catenary
Current collector(s)	Pantograph
UIC classification	D1: Bo′+Bo′ D2: Bo′+2′+Bo′
Bogies	SF 30 C TFW (powered), SF 30 C LFW (D2 trailer)[1]
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge

The D-class Melbourne tram is a fleet of low-floor Combino trams that operate on the Melbourne tram network. They were built by Siemens in Uerdingen, Krefeld, Germany, and are divided into two classes: the three section D1-class which was introduced between 2002 and 2004, and the five section D2-class which was introduced in 2004. The D-class was procured by M>Tram and have been operated by Yarra Trams since they took control of the entire tram network in April 2004.