The AMD4 is a N-scale drop-in decoder for Atlas locomotives. Examples include the following:
Atlas:
- B23-7/B30-7/B36-7
- C628/C630
- Dash8-32BW/Dash8-40B/Dash8-40BW
- DCC-ready RS11
- DCC-ready GP-38, GP-40, GP-40-2
- DCC-ready SD-7, SD-9, SD-35
- DCC-ready U25B and C-420
