Description
The K1D4 is an N-scale drop-in decoder designed for Kato and Athearn locomotives. Examples of compatible models include:
Compatible Locomotives
Kato:
- SD70ACe
- SD40-2
- GG1
- SD70M
Athearn:
- SD75I
For a full list of compatible engines, refer to the Installation Pages.
Important Note
This version of the K1D4 does not include the copper tabs that slip over the motor contacts on the locomotive. Use this version if you need to attach your motor leads using wires.
Key Features
- Back EMF Load Compensation: Provides superior slow-speed control and high performance under load.
- Quiet Drive: Ensures super-quiet motor control for “buzz”-free motor performance.
- DC Mode: Automatically detects DC power and allows configuration for lighting effects on DC.
- RailCom®: Enables the decoder to communicate with the command station, supporting future feature expansions.
- Variable Momentum: Customize acceleration and deceleration curves to suit your needs.
- LED






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