The PCB is equipped with a 21MTC interface, all important connections are led out to large solder pads.

The connections Aux3 to Aux6 are amplified on the pcb and are led out via resistors, so that LEDs can be connected directly to the pcb.

A white LED for the rear light is installed on the circuit board, so the existing bulb can be removed. Nevertheless there are solder connections for the bulb on the circuit board, if you prefer the bulb.

The pcb has the same size of 62 x 26mm as the original pcb and therefore fits exactly into the tender of various Märklin steam locomotives instead of the original pcb and is fixed with the existing screws.

Compatible Locomotives

Various Märklin steam locomotives of the series BR01, BR03, BR24 with long tender, BR41, BR43, BR44, BR50, BR52, series 25021 SNCB of older design as well as other steam locomotives with long tender can be converted with this printed circuit board, for example
BR03: 33951, 33952 , 37951, 37952
BR24: 30032
BR43, BR44: 29845, 34880, 34882, 34883, 34884, 37880, 37882, 37884, 37885
BR50: 33840, 37840, 37841, 37844
and others.
Direct replacement for Märklin decoders 664150, 600258, 602758, 673380 and 609145.
Compare the existing circuit board of your loco with the picture above.

Operating Manual  8041