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Zimo MX645 ('R' 8-pin on wired harness and PluX22 Direct plug-in) Sound Decoder

Code: MX645

Zimo MX645 Sound Decoder Zimo MX645 Sound Decoder 30x15x4mm
1.2A continuous / 2.5A peak
16V direct stay-alive
3W audio / 10 Functions
With native stay-alive
supplied with example capacitor

NOTE: The MX645 has been superseded by the MS450

Zimo MX645 Sound DecoderZimo MX645 Sound DecoderZimo MX645 Sound DecoderZimo MX645 Sound DecoderZimo MX645 Sound DecoderZimo MX645 Sound Decoder

Variants / Sub-Products

MX645R8pin version on wired harness8pin version on wired harness

MX645P22PluX22 direct plug-in versionPluX22 direct plug-in version


The MX645 sound decoder from Zimo is perhaps the industry leader in OO and small O gauge, packed with all the features you have come to expect from Zimo, plus 10 AUX function outputs for lighting, smoke generators, auto-couplings etc., and 'smart stop' energy storage facilities built-in (just add an external capacitor to take advantage).

Supplied with the MX645 is a 'sample' electrolytic capacitor (normally a small 16V 470uF) - worth connecting, but also worth considering an upgrade to 1000uF if you have space in your model, or even better, a SuperCap (6800uF or 17000uF).

Technical Specification

  • 3W audio power
  • 4ohm - 8ohm speakers supported
  • 6-channel output.
  • 1.2A continuous motor output / 2.5A peak for short periods
  • 10 AUX function outputs, max combined 0.8A
  • 2 logic level outputs e.g. servo control / SUSI
  • Energy storage support with Smart Stop
  • 32 MBit memory
  • Railcom
  • DCC, DC-Analog, MM, AC-Analog

Related Products

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Zimo SugarLump

330uF 25V
Electrolytic Capacitor

1000uF 25V
Electrolytic Capacitor

6800uF 15V
Zimo SC68 SuperCap

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