SKU: 1278
$58.95 Buy Now

    The CN is a N-scale drop-in decoder for older Atlas, Kato, and Intermountain locomotives. Examples include the following:


    • GP7/GP9 Old Style
    • GP30/GP35 Old Style
    • SD35/SD50/SD60/SD60M
    • B30-7/B40-8
    • GP38
    • GP40 DCC-Ready
    • SD9 DCC-Ready


    • C30-7
    • U30C


    • SD40T-2

    See the Installations Page for a full list of compatible engines!

    Want to learn more about "Classic N" decoders from TCS? Click Here

  • 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.

  • Variable Momentum:
  • Allows you to make custom acceleration and deceleration curves.

  • 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.

    Interface Type
    Dimensions (L x W x H): .783”x.361”x.101” or 19.9mm x 9.17mm x 2.6mm
    Scale: N Scale
    Continuous/Peak: 1.0/2.0 Amp
    Total Functions: 2
    Function Rating: 80 mA
    Onboard LEDs

    Decoder Literature

    Download CN.pdf (525.9 KB)

    Comprehensive Guides

    Wiring Diagram

    One Year Goof Proof Warranty

    All decoders are covered by a one year goof proof warranty. Please return in a small box.
    You MUST register the failed decoder on our website at
    Follow the instructions on the website before returning any decoders to TCS.