SBB-CFF-FFS RABe 511

Stadler KISS
In service with the Zürich S-Bahn
In service	2011–
Manufacturer	Stadler Rail
Constructed	2008–
Entered service	2011
Formation	Up to 6 cars per train
Fleet numbers	RABe 511
Capacity	First class: 112 Second class: 414
Operator(s)	Swiss Federal Railways and others
Specifications
Car body construction	Aluminium
Car length	25 m (82 ft 1⁄4 in)
Width	2.8 m (9 ft 2 1⁄4 in)
Height	4.595 m (15 ft 7⁄8 in)
Floor height	440 mm (17 in)
Maximum speed	160 km/h (99 mph)
Weight	296 t (291 long tons; 326 short tons)
Power output	6,000 kW (8,000 hp) Max 4,000 kW (5,400 hp) Cont
Acceleration	1.1 m/s2 (3.6 ft/s2)
Power supply	For HVAC
Electric system(s)	15 kV AC 16.7 Hz overhead catenary
Current collection method	Pantograph
Track gauge	1,435 mm (4 ft 8 1⁄2 in) standard gauge

The Stadler KISS is a bilevel electric multiple unit commuter train developed by Stadler Rail of Switzerland. It is operated by the Swiss Federal Railways under the classification RABe 511, as well as by other European railways. In the early stages of development it was known as the Stadler DOSTO.

As of 2016, 242 KISS trainsets comprising 1,145 cars have been sold to operators in nine countries.

The original name, "DOSTO", is derived from the German word Doppelstock, meaning "double decker". Since September 2010, Stadler refers to the train as "KISS", an acronym for komfortabler innovativer spurtstarker S-Bahn-Zug, meaning "comfortable, innovative, sprint-capable suburban train".

The trains's power plant is capable of delivering brief bursts (several minutes) of "sprint" power, over 6,000 kilowatts, enabling it to overtake other trains on short express tracks.

The KISS vehicles are the third generation of vehicles for the S-Bahn Zürich. Compared to previous generations, they are characterized mainly by a higher number of standing passengers per car, in part because the longer trains have proportionately fewer cabs. Also, 15 cm width was won by placing the HVAC channels under the ceiling instead of the side panel. The headroom is still two meters, because friction stir welded floor panels made from aluminium extrusions are used. The number of seats, however, is slightly lower than in the previous models. Like in the KISS's predecessors, low-floor entrances, vehicle air conditioning and vacuum toilets (two, including one wheelchair accessible) are available. There are also two multi-functional areas with storage space for strollers, bicycles and the like.

The six-car train set consists of two power cars and four trailers. In the power heads, all axles are powered. "Eurasia" (version for the Russian gauge railways, as six and four-car formation) has no power heads.

Trainset entering Effretikon railway station, SBB RABe 511