top of page
DCCS Power Amplifier for Aux 3/4 Logic Level Upgrade suits ESU 21 Pin Decoders

Add additional light outputs to your ESU V4.0 decoders.


Have you ever needed one or two more light outputs to finish a project, so added a second decoder or compromised on the lights and just joined them all together on one decoder light output?



The DCC Solutions Power Amplifier is your answer to solving this problem!


If you have ESU 21 Pin decoders, like the LokSound V4.0, LokSound SELECT or LokPilot V4.0, and you want to add more light options, then this power amplifier is what you need to do the job.


The ESU V4.0 decoders with the 21 pin interface only have 4 light outputs that are amplified (powered) to be able to drive loads directly, such as LED lighting. These decoders also have two additional logical outputs which are not amplified (powered) but can be converted via the use of this Power Amplifier to add a powered AUX3 and AUX4 output from the decoder.


By installing the Power Amplifier, making some simple wiring alterations inside your loco, you will be able to reproduce more prototypical features for operating the headlights, white and red markers lights. The front and rear headlights will operate with the headlight outputs and then you have the choice of 4 light outputs that can be assigned to 4 individual function keys of your choice.


The Power Amplifier is so versatile that it can provide additional lighting options by connecting the output wires to any light wire of your choice inside the loco to be controlled by AUX3 and AUX4. Now you can enjoy more prototypical lighting and sound in your locomotive.


Installation is simple – Solder the 3 input wires to the 21 pin socket on the PCB inside the loco and 2 output wires to your LED lights in the loco. Installation instructions included.


This Power Amplifier is not loco model specific, it is universal and can be fitted to any loco with a 21 pin interface.


The DCC Solutions Power Amplifier offers an easy solution to convert any of the logic outputs provided on ESU Decoders into useable light outputs for adding more DCC controlled lights.



  • Model: PA-UNI
  • Decoder Interface: 21 pin
  • Sound Decoders: ESU LokSound V4.0, LokSound SELECT
  • DCC Decoders: ESU LokPilot V4.0
  • Powered Outputs: 2 × 250mA
  • Dimensions: 22 mm x 2.5 mm x 2.5 mm (Approx.)
  • Wires: Thin 0.5 mm diameter (AWG 36) stranded copper wire

DCCS Power Amplifier for Aux 3/4 Logic Level Upgrade suits ESU 21 Pin Decoders

$29.95 Regular Price
$18.00Sale Price
    bottom of page