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Blank Sound DecodersStandard DecodersFunction DecodersAccessory Decoders

BLANK Sound Decoders (with factory/test sound only)

Zimo sound decoders are the industry leaders in terms of features, performance and reliability. All Zimo sound decoders provide the same set of features varying onlyin their physical attributes such as size, motor power output, and number of function outputs.

Which decoder should I choose? Well, this depends on the scale and model you are installing into, how much space you have, and if there are any specific features you need. Contact YouChoos if you need help.

Prices listed below are for factory-default decoders (for no extra cost, choose any YouChoos sound project to have loaded - browse from the sound list rather than here to do this). Speaker is not included.

MS450
30x15x4mm
1.2A continuous / 2.5A peak
16V direct stay-alive (unlimited) with smart-stop
8pin on wired harness or PluX22 direct plug-in
3W audio at 4 ohm or 8 ohm
10 Functions
More Information £115-120
MS450R'R' version 8pin on wired harness

£120
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MS450P22PluX22 direct plug-in version

£115
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MS440
30x15x4mm
1.2A continuous / 2.5A peak
16V direct stay-alive
21pin direct plug-in
3W audio at 4 or 8 ohm
8 Functions
With native 16V stay-alive
supplied with example capacitor (normally 1000uF 16V)
More Information £115
MS440C'C' Version (FA2,3,4,5 outputs are logic-level)

£115
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MS440D'D' Version (All 8 full-power AUX outputs) - will be supplied as 'C' but re-configured to suit 'D' options

£115
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MS480
19x11x3.1mm
0.8A continuous / 1.5A peak
16V direct stay-alive (up to 1000uF) or more via LifeLink or STAC01
8pin on wired harness, 6pin on wired harness or PluX16 direct plug-in
1W audio at 8 ohm
6 Functions
More Information £115-120
MS480R'R' version 8pin on wired harness

£120
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temp out of stock

MS480F'F' version 6pin on wired harness

£120
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MS480P16PluX16 direct plug-in

£115
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special order

MS490
19x9x3mm
0.7A continuous / 1.5A peak
16V direct stay-alive (up to 1000uF) or more via LifeLink or STAC01
8pin on wired harness, 6pin on wired harness or 6pin direct plug-in
1W audio at 8 ohm
4 Functions
More Information £115-120
MS490R'R' version 8pin on wired harness

£120
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MS490F'F' version 6pin on wired harness

£120
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MS490N6pin direct plug-in

£115
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MS500 14x10x3mm
0.7A continuous / 1.5A peak
16V direct stay-alive (up to 1000uF) or more via LifeLink or STAC01
wires-only, or 6pin direct plug-in
1W audio at 8 ohm
4 Functions
More Information £115-120
MS500Wires only version

£120
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PREORDER
awaiting release

MS500N6pin direct plug-in

£115
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temp out of stock

MS580 25x11x4mm
0.8A continuous / 1.5A peak
Tantalums on board + 5V direct stay-alive (unlimited) or more via LifeLink or STAC01
Next18 direct plug-in
1W audio at 8 ohm
4 Functions
More Information £115
MS580N18Next18 with onboard Tantalums for stay-alive

£115
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MS580N18GNext18 with wires for external stay-alive

£115
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soon

MS590 15x10x3mm
0.7A continuous / 1.5A peak
16V stay-alive possible via SACC16/LifeLink
Next18 direct plug-in
1W audio at 8 ohm
4 Functions
More Information £120
MS590N18Next18

£120
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MS950 50x23x15mm
4A continuous / 10A peak
Big stay-alive on-board
Pins to plug into 'L' type interface
2x 3W audio at 4 or 8 ohms
11 Function Outputs
More Information £165
MS950Large scale sound decoder
Pins for 'L' type socket
£165
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PREORDER
awaiting release

LOK950P'L' type adapter plate to take MS950 decoder
61x25x19mm
Solder pads
£15
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MX645
30x15x4mm
1.2A continuous / 2.5A peak
16V direct stay-alive
3W audio / 10 Functions
With native stay-alive
supplied with example capacitor
More Information £105-110
MX645R8pin version on wired harness

£110
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MX645P22PluX22 direct plug-in version

£105
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MX644
30x15x4mm
1.2A continuous / 2.5A peak
25V direct stay-alive (16V via LifeLink/SACC16)
21pin direct plug-in
3W audio / 8 Functions
With native 25V stay-alive
supplied with example capacitor
More Information £105
MX644D'D' Version (All 8 full-power AUX outputs)

£105
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temp out of stock

MX644C'C' Version (5th+6th AUX outputs are logic-level)

£105
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MX648
20x11x4mm
0.8A continuous / 1.5A peak
Stay-Alive via LifeLink/SACC16
1W audio / 6 Functions
More Information £105-110
MX648R8pin on wired harness version

£110
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limited stock available

MX648F6pin on wired harness version

£110
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temp out of stock

MX648P16PluX16 direct plug-in version

£105
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temp out of stock

MX649
23x9x4mm
0.7A continuous / 1.5A peak
Stay-Alive via LifeLink/SACC16
1W audio / 4 Functions
More Information £105-110
MX649R8pin on wired harness version

£110
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temp out of stock

MX649F6pin on wired harness version

£110
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temp out of stock

MX649N6pin direct plug-in version

£105
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MX658N18 25x10.5x4mm
0.8A continuous / 1.5A peak
Stay-Alive via LifeLink/SACC16 if model provides connections
Next18 direct plug-in
1W audio / 4 Functions
£105
temp out of stock
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MX659N18 20x9.5x3mm
0.7A continuous / 1.5A peak
Stay-Alive via LifeLink/SACC16 if model provides connections
Next18 direct plug-in
1W audio / 4 Functions
Slightly less stay-alive on board than then 658 but very very small!
£105 Add to basket

MX660 42x9x2.5mm
0.8A continuous / 1.5A peak
Extra Stay-Alive via LifeLink/SACC16
Drop-in replacement board to suit many N gauge diesel models (and others)
1W audio / 6 Functions
Solder pad connections
Built-in resistors for LED lighting
£105 Add to basket

MX696KS
69x29x19mm
4A continuous / 10A peak
16V direct stay-alive
10W audio / 8 Functions
With stay-alive connections
Combo package includes MX696S decoder and LOKPL96KS screw-terminal adapter board - practical/simple combination More Information £155
temp out of stock
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MX699K
50x40x14mm
6A continuous / 10A peak
Stay-Alive Built In
10W audio
With native stay-alive
onboard 3F SuperCap stay-alive
More Information £185-£195
MX699KS8 AUX functions version

£185
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temp out of stock

MX699KVFull 14 AUX functions version

£195
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temp out of stock

Replacement Zimo N/OO MX64*/65*/660/MS series Sound Decoder Send back your damaged Zimo sound decoder for immediate replacement
Contact YouChoos with required project and details
Like-for-like
£30 Add to basket


Standard Decoders

Standard decoders mean that you can control motor and one or more auxilliary/function outputs (for lighting, smoke etc.). These are NOT sound decoders. Choose based on size, motor power output, and required outputs.

Zimo standard decoders are probably the best available for fine motor control and offer a variety of CVs to assist in tuning outputs to get the best from your models.

Ask if you need help choosing! YouChoos holds stock of most of these decoders.

Zimo MX600 25x11x2mm - super thin
0.8A continuous / 1.5A peak
Stay-Alive not practical
4 Functions
8pin on wired harness version
Affordable Zimo greatness!
£24
MX600R8pin wiredAdd to basket

temp out of stock

Zimo MX615
8.2x5.7x2mm
0.5A continuous / 1A peak
Stay-Alive via LifeLink/SACC16
4 Functions
Available in 6pin direct plug-in version or wires-only version (may be supplied with 6pin or 8pin plug on the end)
Zimo's smallest ever motor decoder!
NOTE: should NOT be used on Analogue systems!
£36-£38
MX615N6pin direct

£36
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MX615Wires-only

£38
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Zimo MX616
8x8x2.4mm
0.7A continuous / 1.5A peak
Stay-Alive via LifeLink/SACC16
6 Functions
Available in 6pin direct plug-in version or wires-only version (may be supplied with 6pin or 8pin plug on the end)
£34-£36
MX616N6pin direct

£34
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temp ouf of stock

MX616Wires-only

£36
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Zimo MX617
13x9x2.5mm
0.8A continuous / 1.5A peak
Stay-Alive via LifeLink/SACC16
6 Functions
Available in 6pin direct plug-in version (N) or wires-only version (may be supplied with 6pin plug on end)
£24-£34
MX617N6pin Direct

£24
Add to basket

temp out of stock

MX617F6pin plug on wired harness 'F' version

£24
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temp out of stock

MX617R8pin on wired harness 'R' version

£34
Add to basket

temp out of stock

Zimo MX618N18
15x9.5x2.8mm
0.8A continuous / 1.5A peak
Stay-Alive via LifeLink/SACC16 if model provides connections
4 Functions
Next18 direct plug-ing interface
£24
MX618N18Next18Add to basket

temp out of stock

Zimo MX623
20x8.5x2.5mm
0.8A continuous / 1.5A peak
Stay-Alive via LifeLink/SACC16
4 Functions
Available in 6pin wired (F) version on 8pin wires (R) version
£32
MX623F6pin wired

£32
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MX623R8pin wired

£32
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Zimo MX630 20x11x3.5mm
1A continuous / 2.5A peak
Stay-Alive via LifeLink/SACC16
6 Functions
Available in 6pin wired (F) version or 8pin wired (R), or PluX16 version
£34-£36
MX630F6pin wired

£36
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MX630R8pin wired

£36
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MX630P16PluX16

£34
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limited stock

Zimo MX633 22x15x3.5m
1.2A continuous / 2.5A peak
16V direct stay-alive
10 Functions
8pin on wired harness, or PluX22 direct plug-in versions
£40-£42
MX633R8pin wired

£42
Add to basket

temp out of stock

MX633P22PluX22

£40
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temp out of stock

Zimo MX634 20.5x15.5x4mm
1.2A continuous / 2.5A peak
25V direct stay-alive (16V via LifeLink/SACC16)
6 Functions
Available in 8pin wired (R) version or 21pin direct (D - switchable to C)
£36-£38
MX634R8pin wired

£38
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limited stock available

MX634D21pin (can be changed to 'C' variant with CV change)

£36
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limited stock available

Zimo MX635 25x15x4.7mm
1.8A continuous / 2.5A peak
16V direct stay-alive
10 Functions
High power 8pin on wired harness version
Direct connection of 16V capacitors for stay-alive
£40-£42
MX635R8pin wired

£42
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MX635P22PluX22

£40
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temp out of stock

Zimo MX636 25x15x3.5mm
1.8A continuous / 2.5A peak
16V direct stay-alive
8 Functions
21pin direct plug-in version
£40
MX636D21pin

£40
Add to basket

temp out of stock

Zimo MX637 22x15x3.5m
1.2A continuous / 2.5A peak
No direct stay-alive connection
10 Functions
PluX22 Direct plug-in version
NOTE: this is an economy version of the MX633PluX22 but without the direct stay-alive
£24
MX637P22PluX22

£24
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temp out of stock

Zimo MX638 20.5x15.5x4mm
1.2A continuous / 2.5A peak
Stay-Alive via LifeLink/SACC16 if model provides connections
6 Functions
21pin MTC direct plug-in version
£24
MX638D21pinAdd to basket

temp out of stock

Zimo MX696N 55x29x15mm
4A continuous / 10A peak
16V direct stay-alive
8 Functions with stay-alive facility
Pin/solder connections
£90
MX696Npins

£90
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Function Decoders

Function decoders offer ONLY auxilliary/function outputs, and DO NOT have output for controlling motor or sound.

They have a wide variety of applications, but most commonly used to add lighting, smoke, or auto-coupling control to a vehicle that has no motor. For example, many modern steam locos have a DCC decoder socket in the tender, which gives control of the motor, so a separate function decoder can be added in the boiler of that loco to provide control of loco lamps, firebox glow and other special features.

Another common use is to provide DCC control of coach lighting, which is particularly effective where the decoder supports a stay-alive capacitor which helps eliminate flicker.



Zimo MX689N18 14x9.5x2.1mm
0.7A 8 Functions
Next18
Stay-alive possible via LifeLink from pads on reverse
£22 Add to basket

Zimo MX671
10.5x8x2.2mm
0.7A 6 Functions
Available in 6pin direct version (N) or wires only version (wired version includes Ground wire for stay-alive pre-connected).
Direct connection of 25V stay-alive supported
£22-£24
MX671Wires-only (often supplied with 6pin or 8pin plug on the wired harness)

£24
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temp out of stock

MX671N6pin Direct

£22
Add to basket

temp out of stock

Zimo MX685 20x11x3.5mm
1A 8 Functions
wires-only version
£26
MX685wires only

£26
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Zimo MX687W 28x15.5x4mm
1.2A 8 Functions with stay-alive facility, full feature/power version of MX686
wires-only version
£36
MX687Wwires only

£36
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Accessory Decoders

Accessory decoders are static decoders on your layout, deployed to control points and lighting features. Some allow control of solenoid-style point motors, and others give fine servo-control for slow-action points. You need a DCC controller that understands how to drive accessory decoders (most controllers other than the very basic ones can do this).

Train-Tech PC200 Quad Point DCC Controller Controls 4 solenoids by DCC and external switches. Route store sets routes with one command. Features a built-in CDU for efficient operation of solenoid motors. Easy to programme. £43 Add to basket

Train-Tech PC2 Quad Point DCC Controller Controls 4 solenoids by DCC (same as PC200 but without external switch connections)). Route store sets routes with one command. Features a built-in CDU for efficient operation of solenoid motors. Easy to programme. £38 Add to basket

DigiKeijs DR4018 16-channel accessory switching decoder (not for servos) £38 Add to basket

DigiKeijs DK50018 16-channel accessory switching decoder (not for servos). The DK50018 is the next generation of smart devices, equivalent to the DR4018 but with BlueTooth connection to DigiKeijs' iOS/Android app for direct and easy configuration. £80 Add to basket



DigiKeijs DR4018 with 8x MP1 MTB Point Motors Ideal companions: DR4018 16-channel accessory decoder (not for servos), complete with 8x of the excellent MTB MP1 slow-action point motors £145
limited stock available
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DigiKeijs DR4024 4-channel accessory decoder for servos with 4 additional switching outputs £30 Add to basket

DigiKeijs DR4024 Kit Includes DR4024 4-channel accessory decoder for servos with 4 additional switching outputs, plus 4 mini-servos and 50cm servo extension cables £66 Add to basket

Zimo MX820E 19x11x2mm
1A, 1 point (not servo), 2 inputs
£24
temp out of stock
Add to basket

Zimo MX820V 19x11x3mm
1A, 2 points (not servos), 4 inputs
£34 Add to basket

Zimo MX820X 19x11x2mm
1A, 1 point (not servo), 2 inputs, 8 lights
£38 Add to basket

Zimo MX820Y 19x11x3mm
1A, 2 points (not servos), 4 inputs, 16 lights
£42 Add to basket

Zimo MX820Z 19x11x3mm
1A, 0 points, 0 inputs, 16 lights
£28
temp out of stock
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Zimo MX821S 105x50x11mm
3A, 8 points (3-pin servos), 0 inputs, 0 lights
£66 Add to basket

Zimo MX821V 105x50x11mm
3A, 8 points (3-pin servos), 16 inputs, 16 lights (100mA each), Railcom for feedback of position
£96 Add to basket

DigiKeijs DR5013 Ultimate Reversing Loop Module The Digikeijs DR5013 digital reverse loop module offers a total solution. This reverse loop module contains many aspects that make it a good module. Think of AutoReverse short circuit detection, busy indication of the reverse sections (T, S1, S2), an integrated Railcom and much more. This reverse loop module also offers you the possibility of easy configuration via a USB connection. £91
ordered on request
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DigiKeijs DR4050 RGB Controller RGB LED controller including accessories to create night/day lighting effects £154
ordered on request
normally within
1-3 days
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