Prototype: Add-on cars for the Swiss Federal Railways (SBB) class RABe 501 Giruno high-speed powered rail car train. 1 type J (A4) intermediate car, 1st class. 1 type K (A3) intermediate car, 1st class. The cars go with train number RABe 501 004. The cars look as they did around 2018/2019.
Model: This is a 2-part add-on car set to expand the class RABe 501 Giruno high-speed powered rail car train to an 11-part unit. The cars have factory-installed interior lighting with maintenance-free warm white LEDs. The interior lighting is supplied with power from a continuous electrical connection throughout the entire train. It can only work and be controlled digitally in conjunction with the basic set. Both intermediate cars are coupled permanently to each other. There is a guide mechanism in the Jakobs trucks. The train is modelled true-to-scale. The minimum radius for operation is 360 mm / 14-3/16. Length of the pair of cars 40.2 cm / 15-13/16.

The 25811 basic set can be expanded to a prototypical 11-part unit with the 23284 and 23285 add-on car sets.

This add-on car set for the class RABe 501 Giruno can be found in an AC version in the Märklin H0 assortment under item number 43467.