DN121 1 Amp Wired Mobile Decoder, 2 Function

This product has been replaced by the 1 Amp Economy Wired Decoder, 2 Functions, Z Scale (DZ123) and is no longer available. Click here to view the DZ123.

1 Amp (1.5 Amp Peak) Mobile DCC Decoder

Please use 3 step speed tables for all DZ121 & DN121 Series Decoders, because of size constraints in their processors, they do not support 28 step speed tables.

Non-directional headlights are NOT available on DN121 Series Decoders.

Retired in 2003


Current Rating-Motor
1.0 Amp (1.5 Amps Peak)
0.36” x 1.0” x 0.18” (9.14mm x 25.4mm x 4.57mm)
Wired approx. 6.9" (175mm) wires
Function Outputs
Function Type
Standard (read more)

Standard functions turn functions on and off. Many Digitrax decoders with standard functions offer head lights that can be set up to be either automatically reversing or individually controllable.  Digitrax decoders are shipped with automatic reversing head lights enabled.  When you are using a standard function output, simply hook up the function output to the function device and you will be able to turn it on and off from your throttle.

Replaced by