The ALD4 is a drop-in for the Atlas N scale SD50 and SD60 locomotives.
This full featured 4 function BEMF decoder is designed to fit the following Atlas N-Scale engines: GP40, SD50 and SD60. Included is our auto-adjusting BEMF for outstanding slow speed performance and hassle free set up. Also includes Quiet Drive for super quiet engine performance.
Features onboard 680 ohm 1/4 watt resistors for LEDs.
Dimensions 3.035″ x .035” x .13” or 77.09mm x 8.89mm x 3.3mm