Prototype: Swiss Federal Railways (SBB) class Re 4/4 II electric locomotive as a class Re 421, used for the SBB Cargo freight area. Fire red / ultra marine blue basic paint scheme. Road number 421 378-1. The locomotive looks as it did around 2018.

Highlights:
- high-efficiency propulsion as a centrally mounted motor;
- all 4 axles powered using cardan shafts;
- "World of Operation" mfx+ decoder with extensive light and sound functions included;
- long-distance headlights, cab lighting, and engine room lighting can be controlled digitally.

Model: The locomotive has an mfx+ digital decoder and extensive sound functions. It also has controlled high-efficiency propulsion with a flywheel, centrally mounted. 4 axles powered using cardan shafts. Traction tires. The triple headlights and one white marker light (Swiss headlight / marker light code) change over with the direction of travel, will work in conventional operation, and can be controlled digitally. The light code can be switched to a red marker light when the locomotive is running "light". The headlights at Locomotive End 2 and 1 can be turned off separately in digital operation. When the headlights are off at both ends, then the double "A" light function is on as a red emergency stop light. Maintenance-free, warm white and red LEDs are used for the lighting. The locomotive has separately applied metal grab irons. The couplers can be replaced by end skirting included with the locomotive. Length over the buffers 17.1 cm / 6-3/4".

This model can be found in a DC version in the Trix H0 assortment under item number 22846.