Digitrax 20022 SDH166D Standard 1 Amp Sound Decoder, HO Scale

DigitraxSKU: DTX00020022


New Page 1

SDH166D fits many HO locomotives.

Comes with selectable Steam & Diesel sounds so you can use it in any type of

  • 1.0 Amp/ 2.0 Amps Peak Current Rating
  • 6 FX3Functions-200mA
    total current
  • FX3Outputs are
    optimized for both LED & bulbs
  • Configurable FX3pulse
    on all function leads
  • Series 6 features
  • 3 Simultaneous Voices
  • Customizable 8 bit sound projects

  • Use PR3 and SoundLoader 2.0

  • 4 Megabit on board sound memory
  • 8 Ohm 16 x 26 x 9mm box speaker included
  • 1 Watt sound output
  • 330uF Capacitor for sound hold up included
  • Cam input synchronized steam chuff
  • Works with PX112-10 Power Xtender
  • Decoder Body Size 1.28 x 0.67 x 0.25

SDH166D replaces SDH164D.

Digitrax SoundFXSound
Your locomotives will sound in scale like the real thing with SoundFX

  • Customizable 8 Bit Sound
  • Works with SoundFX 8 Bit sound files
  • 3 Simultaneous Voices
  • Downloadable Sound with Digitrax PR3 and SoundLoader 2.0 software
  • 4 Megabit Onboard Sound Memory
  • 1 Watt Sound Output
  • Cam input-synchronized Steam-chuff option for Steam locos
  • Scaleable Speed Stabilization(BEMF) optimized for sound operationSoundFX
    does not require an external rate sensor to vary workload.
  • Factory 8 Ohm 16 x 26 x 9 mm box speaker on 10 Pin Plug design makes
    installation quick and easy.

Easy Programming and Installation

  • Smart Power Management-no more booster or programmer shutdowns!
  • Program CVs using any Digitrax Compatible Control system without having to
    buy any extra equipment.
  • Digitrax Easy Connect 9 Pin Plug for Track, Motor and Function Control.
  • Direct mode programming.
  • Decoder Reset CV with or without speed table reset.

Series 6 Decoder Features

  • Works with PX112-10 Power Extender for improved operation in the presence
    of intermittent track power.
  • Digitrax FX3Functions-Control
    lights and functions for prototypical lighting effects and on/off control.
  • Configurable FX3Pulse
    Function available on all function outputs.
  • Improved Scaleable Speed Stabilization (BEMF)

Lets your trains run like the real thing!

  • 2 Digit and 4 Digit Addressing.
  • Basic, Advanced & UniVersal Consisting.
  • SuperSonic motor drive for silent operation.
  • Transponder Equipped ready for transponding on your Layout.
  • Motor Isolation Protection helps prevent damage to your decoder.
  • DCC Compatible.
  • FCC Part 15, Class B RFI compliant.


Current Rating-Motor

1.0 Amps/2.0 Amps Max


1.28 x 0.67 x 0.25 (32.5mm x 17.02mm x 6.35mm)



Function Outputs


Function Type



Series 6

For Use With

PX112-10 Power Xtender

Current Rating-Functions

200 mA

Original Release Date



8 Ohm 16 x 26 x 9mm box speaker


330uF for sound hold up

Simultaneous Voices


Onboard Sound Memory

4 megabit

Sound Projects Supported

8 bit sound projects



Payment & Security

Amazon American Express Apple Pay Diners Club Discover Meta Pay Google Pay Mastercard PayPal Shop Pay Venmo Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

You may also like

Recently viewed