Siemens SD-100 and SD-160

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Siemens SD-100 Siemens SD-160
RTD #101, the first SD-100 built, at I-25 & Broadway station in 2012
Diagram of the Siemens SD100
In service	1994–present
Manufacturer	Siemens Mobility
Built at	Florin, California
Constructed	1992–2013
Entered service	1995–present
Number built	431
Successor	Siemens S700 and S70 Siemens S200
Capacity	60 (seated) 190 (maximum)
Operators	RTD Denver San Diego Trolley Calgary Transit Edmonton Transit System Salt Lake City UTA TRAX
Specifications
Car length	24.799 m (81 ft 4+3⁄8 in)
Width	2,652 mm (8 ft 8+3⁄8 in)
Height	3,780 mm (12 ft 4+7⁄8 in)
Floor height	991 mm (3 ft 3 in)
Doors	8 (4 per side)
Articulated sections	1
Maximum speed	80 km/h (50 mph)
Weight	40,370 kg (89,000 lb)
Traction motors	2 × 200 hp (150 kW) 4 × 194 hp (145 kW)
Acceleration	1.07 m/s2 (2.39 mph/s)
Deceleration	1.31 m/s2 (2.93 mph/s) (service) 2.63 m/s2 (5.88 mph/s) (emergency)
HVAC	Roof-mounted air conditioning
Electric system(s)	600-750 V DC overhead lines
Current collector(s)	Faiveley pantograph
UIC classification	Bo’2Bo’
AAR wheel arrangement	B-2-B
Coupling system	Scharfenberg
Multiple working	up to five cars
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge
Notes/references
[1]

The Siemens SD-100 and SD-160 are two related types of high-floor light rail vehicles (LRV), manufactured by Siemens Mobility for the North American market. A total of 431 vehicles were built by Siemens in Florin, California from 1992 to 2013.

The SD-100 began production in 1992, and is equipped with direct current traction motors and folding doors. It was succeeded in 2001 by the revised SD-160, which is equipped with alternating current motors and plug doors. The first orders for the SD-160 were placed in 2001, and production continued until 2013.

A related design is the SD-400/SD-460 high-floor light rail vehicle, which was initially built by a Siemens–Duewag joint venture. Siemens purchased Duewag in 1999, and assembled the SD-460 model alongside the SD-100/SD-160 in Florin, California.

The SD-100, SD-160, SD-400, and SD-460 were succeeded in the 2010s by newer LRV designs from Siemens, including the low-floor S700 and S70 and the high-floor S200. As of 2024^[update], most SD-100 and SD-160 vehicles remain in service with their original operators.