Train Control Systems M4 is a small form factor hard-wire decoder

$51.95 $47.59


The M4 is a small form factor hard-wire decoder with 4 lighting functions for HO and N scale installations. This decoder is designed for installations where space is limited.

This decoder is also available with 8-pin NMRA plugs or Keep Alive® wires factory-installed. See the “Variants” page for more options.

  • 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.



Interface Type: Hard-Wire

Dimensions (L x W x H): .567”x.359”x.135” or 14.4mm x 9.12mm x 3.43mm

Scale: HO Scale N Scale

Continuous/Peak: 1.0/2.0 Amp

Total Functions: 4

Function Rating: 100 mA

12V Outputs: 4




Decoder Literature:  M4.pdf

Comprehensive Guide:  Comprehensive-Programming-Guide.pdf