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  • Interface Type: Hard-Wire
  • Dimensions (L x W x H): 0.945" x 0.657" x 0.33" or 24mm x 16.7mm x 8.38mm
  • Scale: HO Scale
  • Continuous/Peak: 1.0/2.0 Amp
  • Total Functions: 4
  • Function Rating: 200 mA
  • 12V Outputs: 4

This hardwire decoder is the smallest decoder with built in Keep-Alive™ that TCS produces.

It will keep your locomotive operating for 6-15 seconds without power (As a result of dirty track, poor contacts, etc.).

While physically larger than a M-series decoder, the KAM4 features the same operational characteristics.


  • Keep-Alive®: Included on-board for smooth, stutter-free operation.
  • 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.
  • 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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