This decoder is for converting Märklin/Trix H0 locomotives with built-in high-efficiency motors or other DC motors. The märklin SoundDecoder mSD3 has a 21-pin 21mtc (adheres to NEM 660) interface con...
with 2 buffer capacitors with each 1 Farad for connection to the mLD3 und mSD3, item numbers 60972, 60975, 60976, and 60977. The buffer capacitor prevents light flickering and sound dropout from dirty track...