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🚂 Unlock full control and bring your model railway to life with Hornby's sleek DCC decoder!
The Hornby 4 Function DCC Decoder (Medium) is a compact, 18mm long 8-pin decoder designed for OO gauge model trains. It enables precise digital control of your model railway’s lighting and movement using DC power, requiring no batteries. Compatible with Hornby DCC layouts, it offers an easy upgrade path for hobbyists seeking enhanced realism and control, backed by Hornby's century-long heritage in model railway excellence.









| ASIN | B001DXEXI8 |
| Age Range Description | Kid |
| Best Sellers Rank | 133,148 in Toys & Games ( See Top 100 in Toys & Games ) 23 in Model Train Transformers & Decoders |
| Brand Name | Hornby |
| Colour | Multicolor |
| Customer Reviews | 4.6 4.6 out of 5 stars (599) |
| Educational Objective | Develop fine motor skills and understanding of electronic components through model railway assembly and operation |
| Global Trade Identification Number | 05010963482497 |
| Included Components | Model Accessory |
| Is Assembly Required | No |
| Item Dimensions | 10.5 x 1.5 x 8 centimetres |
| Item Type Name | Hornby 00 Gauge Standard 8 Pin Decoder |
| Item Weight | 9 g |
| Manufacturer | Hornby Hobbies Ltd |
| Manufacturer Part Number | R8249 |
| Manufacturer Warranty Description | 1 year limited warranty |
| Material Type | Metal, Plastic |
| Maximum Age Recommendation | 1188.0 |
| Minimum Age Recommendation | 167.98 |
| Model Number | R8249 |
| Number of Packs | 1 |
| Number of Players | 1 |
| Operation Mode | Manual |
| Power Source | DC power supply |
| Size | Medium |
| Subject Character | Loco Decoder |
| Supported Battery Types | No batteries required |
| Theme | Trains & Railways |
| UPC | 791068062801 746550556863 785924224489 |
| Unit Count | 1.0 count |
E**S
Easy DCC.
Excellent entry level DCC Decoder. But no sound. Combined with a Hornby DCC Select controler, HM 7000 dongle, & your mobile phone with HM 7000 app. And away you go.
S**S
Update your model railway
I'm just upgrading my Hornby locos to DCC and these decoders are perfect for the job. I have to cut off the 8 pin connector as the locos are not DCC ready. Not all are suitable for the upgrade. It only needs a little soldering skill and some heat shrink sleeving and double sided sticky pad and the job is done! Connected LED lighting front and rear and it really does make a difference. These decoders are good and reliable if respect for electronic components is taken. Very pleased!
J**R
Hornby R8249 Decoder
Some people do like to expend effort talking down low-end hornby products, but I've installed 6 of these and my direct experience has been positive. There are the basic features needed in the product for lights and control, and although the top speed of the loco cannot be set the acceleration rate can. Each model has a different top speed becuase of the way it is built physically, it's not always accurate, but my Virgin tilting train obliges by going 2-3 times faster than my Tornado (these two models both hornby). If you currently inclined towards the "I want to get it up and running" end of modelling rather than the "adherance to protocol" end, these can be just the ticket. I also had a basic bachman decoder, which I'm now having to replace (yes, with a hornby one) because it won't respond to any commands when the "zeros are stretched". [the stretched zeros feature was intended to allow control of one analogue loco on a DCC circuit, but I would not recommended that for any length of time! I use it to drive dimmable lighting in the carriages instead.] Oh, and don't stress the wires. Two things you can do to help the life of these decoders; 1) put a cable tie (or just a piece of [insulate] wire) around all the wires from the decoder board. This will keep them in a bundle and help prevent you from breaking the solder joints on any one wire. 2) wrap the decoder board in insulating tape as soon as its unpacked so you don't fry it with static from your fingers.
S**E
Original Hornby part
Good quality item
M**.
A very good basic 4 function decoder, I always keep 1 spare.
Easy to fit, I use the polythene pouch (cut down) to encase decoder board as isolation from any other parts inside train. Easy to programme using the Hornby Elite controller.
M**R
Cheap but does the job!
I secured the wires from the decoder with tape upon arrival - meaning that wires will not become dislodged when being worked with. The decoder is functional, responsive and entirely effective at it's job and honestly, there's no need to spend more - providing you secure it in such a way that prevents it from being knocked around within the chassis!
M**2
Good quality affordable decoder
When it comes to installation of digital decoders in model railway trains, I have always followed the principle of using the manufacturers own products, for example if it is a Hornby locomotive, I'll use a Hornby decoder, if it is a Bachmann locomotive, I'll use a Bachmann decoder. I have never had any problems or issues using this method and for my use, which is a small shunting layout where only one locomotive is moving at any one time, this is an ideal, good quality affordable decoder.
A**R
damage pins
when arrived all the pins are bent and the outer packing broken
G**.
Fonctionne bien
Le décoder fonctionne très bien sur un TGV jouef junior , bon ralentit Par contre , sur une PIKO 67920 , ça saccade au ralentit .
J**I
Perfectos y a un precio muy competitivo
Con toda la calidad de Hornby, y colocados en locomotoras Electrotren, van de lujo. Conectar y funcionar. Y a demás, el tamaño es idoneo, caben perfectamente en cualquier locomotora H0, incluso podría decir que en alguna N, pero es mas difícil. DCC al alcance de casi cualquier bolsillo. Muy recomendable!
M**L
⭐️⭐️⭐️⭐️⭐️
⭐️⭐️⭐️⭐️⭐️ Zuverlässiger Decoder – einfach & funktional Ich habe den Standard-Lokdecoder in eine ältere Gleichstromlok eingebaut – der Einbau war unkompliziert, alle Funktionen liefen auf Anhieb. Die Fahreigenschaften haben sich deutlich verbessert, das Anfahrverhalten ist jetzt viel sanfter. Auch die Programmierung mit der Zentrale (in meinem Fall eine ESU ECoS) war problemlos. Kein Schnickschnack, aber genau das, was man für einen zuverlässigen Digitalbetrieb braucht. Für den Preis absolut empfehlenswert!
M**Y
Ottimi decoder base Hornby
In confezione originale, sigillati, perfettamente funxionanti.
S**K
Hornby DDC decoder
Very impressed with quick delivery and good price.
Trustpilot
1 week ago
1 month ago