The AMD4 is drop in for the Atlas: GP-38, RS-11, Dash8-40B, Dash8-40BW, C628, C630, B23-7, B30-7, B36-7, Also DCC ready version of GP-40, GP-40-2, SD-7, SD-9, SD-35, TrainMaster and U25B.
- Golden White LEDs for headlight and backup light
- Two Extra Function Outputs
- "X" series features
- TCS exclusive auto-adjusting BEMF
- Dimensions 2.83x.351x.13 (71.88mm x 8.92mm x 3.3mm)