A4X Decoder with Keep Alive – #TCS-A4X-KA



This full featured, 4 function, drop-in decoder was originally designed to replace the early Atlas lighting boards. Since then several other manufacturers have adopted the same lighting board style making the A4X an excellent option for any HO locomotive with the large, tab connected lighting board. 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.

Decoder features:

  • Motor Current
    • 1.3 amp maximum
    • 2 amp stall current rating
  • Lighting functions
    • Four outputs
    • Special lighting effects
    • LED friendly effects
    • On-board dropping resistors for LED drive
  • Back EMF or Dither Quiet Drive selectable by CV
  • Size:
    • 0.68 x 2.88 x 0.145 inches
    • 17 X 73 X 3,5 mm

Additional information

Weight 0.10 lbs