Shop model train decoders for sale for adding or replacing digital control, sound, lighting, and other functions. Find accessory, function, multifunction, and sound decoders for locomotives, rolling stock, turnouts, accessories, and other model railroad applications.
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A decoder receives digital commands from a compatible model railroad control system and turns those commands into actions. Depending on the decoder, that can mean controlling locomotive speed and direction, operating lights and other onboard functions, adding sound, or controlling stationary layout equipment such as turnouts and accessories.
The products here include several types of model train decoders, and the right choice depends on what you want to control. Before buying, consider the locomotive or accessory, decoder type, available installation space, electrical requirements, connection style, current rating, and compatibility with your control system.
Designed for stationary layout equipment such as turnouts, signals, lighting, animation, and other operating accessories.
Used to control auxiliary features such as headlights, interior lighting, ditch lights, beacons, smoke, or other functions without necessarily controlling a motor.
Mobile decoders commonly installed in locomotives to control speed and direction along with lighting and other programmable functions.
Provide digitally controlled sounds such as horns, whistles, bells, prime movers, and steam effects. Some also include motor and lighting control.
These categories can overlap. For example, a sound decoder may also be a multifunction locomotive decoder with motor, lighting, and sound control built into one unit.
Start with what the decoder needs to do. A locomotive that needs motor control requires a different type of decoder than a turnout, accessory, passenger-car lighting installation, or sound-only upgrade.
For locomotive installations, check the available space, motor current requirements, connector or socket type, number of function outputs, and whether the model is decoder-ready. Sound installations may also require a compatible speaker and enough room for both the decoder and speaker.
Trainz carries changing new and pre-owned decoder inventory from different manufacturers and eras. Shoppers may find current decoders as well as discontinued, new old stock, and harder-to-find models for repairs, upgrades, or older DCC-equipped trains.
A decoder receives digital commands from a compatible control system and uses them to operate a locomotive, accessory, lighting function, sound feature, or other model railroad device.
An accessory decoder controls stationary layout devices, while a multifunction decoder is generally used in locomotives or other mobile equipment for functions such as speed, direction, lighting, and sound.
A function decoder controls auxiliary features such as lighting without necessarily controlling a motor. A multifunction decoder typically combines locomotive motor control with additional programmable functions.
Some do and some do not. Certain sound decoders combine motor, lighting, and sound control, while others are intended primarily or solely for sound.
Trainz offers model train decoders for sale, including accessory, function, multifunction, and sound decoders, with new, pre-owned, discontinued, new old stock, and hard-to-find models available as inventory changes.
For additional electrical and repair components, browse Model Train Electrical & Electronic Parts or explore Model Train Parts. You can also shop Model Trains across scales and manufacturers.
