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SKU: TCS1293

TCS 1293 K1D4 4-Function N Scale DCC Drop-in Decoder for Kato & Athearn Diesel

One Year Goof Proof Warranty
All TCS decoders are covered by a one year goof proof warranty.


The K1D4 is a 4-function N-scale drop-in decoder designed for Kato and Athearn locomotives. Examples include the following:


  • SD40
  • SD70/SD70M/SD70MAC
  • GE C44-9W
  • GE AC4400W


  • F45

See the installation pages for a full list of compatible engines!

Note: This version of the K1D4 has copper tabs installed which slip over the motor contacts on the locomotive. If your locomotive uses wires, see the "-NC" version.

  • Back EMF Load Compensation: Provides superior slow speed control and high performance under load.
  • Quiet Drive: Super-quiet motor control for "buzz" free motor performance.
  • DC Mode: Decoder will automatically detect DC power. You can also configure how your lighting effects function on DC.
  • RailCom®: This feature allows the decoder to talk to the command station. RailCom supports expansion for new features.
  • Variable Momentum: Allows you to make custom acceleration and deceleration curves.
  • LED Support: This product does not require external resistors when connecting LED's.
  • Incandescent Bulb Support: This decoder can be used with 12 Volt bulbs.
  • Function Remapping: Buttons 0 through 12 may be used to control the lighting functions of this decoder.
  • Programmable Lighting Effects: Choose from 20 separate user-programmable lighting effects!
  • Dimmable Brightness: Configure multiple different brightness levels for your LED's or incandescent bulbs.
  • Decoder Lock: Feature which prevents accidental/unwanted programming while activated.
  • Airwire™ Compatible: Fully compatible with Airwire™ operation.
  • User-Loadable Speed Tables: Configure custom speed curves and set speed limits.

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