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The ASD4 is a N-scale drop-in decoder for Atlas locomotives. Examples include the following Atlas:

  • GP7/GP9
  • GP15
  • GP30
  • GP35


  • Interface Type: Drop-In
  • Dimensions (L x W x H): 2.309" x 0.355" x 0.089" or 58.65mm x 9.02mm x 2.26mm
  • Scale: N Scale
  • Continuous/Peak: 1.0/2.0 Amp
  • Total Functions: 4
  • Function Rating: 80 mA
  • 12V Outputs: 2
  • LED Outputs: 2
  • Onboard LEDs: 2
  • 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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