3V Adapter Square
3 volt power supply has a power jack
3 Volt Adapter
3 volt power supply with switch
3 volt power supply barrell plug
3 volt power supply
switch between 3 volt power supply and battery pack
3 volt power supply and battery pack

3-Volt Power Adapter/Transformer

Battery Option
Regular price $12.00
  • In stock, ready to ship
  • Inventory on the way


Our 3 Volt 1 amp power supply adapter can run 1 - 50 LEDs and is Guaranteed to correctly run all of our 3 Volt DC LEDs

  • 1 Amp will run from 1 - 50 LEDs
  • 2 Amp will run from 1 - 100 LEDs

These regulated power supplies will put out exactly 3 Volts of power if you hook one single LED to it, or hook the maximum number of LEDs to it. They are regulated and able to run delicate electronics like LEDs and circuits.

These UL listed Adapter / Transformers convert wall current to 3 Volt DC output, perfect for our 3 volt LEDs.

Input: AC 120-240V 60HZ 10W Output: Regulated 3V DC 1000mA Center positive


  • Plug Diameter 5.5mm
  • Length 10mm
  • 57 inches from the Adapter body to barrel plug 

We also have a screw thread power jack that can be mounted on a panel or a flat exterior surface of your model.
Panel Mount Power Jack dreamstime

Standard Power Jack is Included Free

The power jack receiving end plugs into our power adapter.  At the other end, we have added a short piece of red and black wire.

Here's how to use it:

  • Mount this small power jack inside of your model.
  • Connect the red power lead to all of the red leads on your LEDs, use shrink tube or electrical tape to protect the connection.
  • Connect the black power lead to all of the black leads on your LEDs, again using tape or shrink tube.
  • Make your connections on the inside of the model.
  • When you are finished, plug in the adapter and enjoy your LEDs for years and years!

Adapter with On/Off Switch:

  • The on/off switch can run 100 LEDs.
  • The switch is mounted 6 inches from the barrel plug.

After plugging in the adapter, just press the switch once to turn on all lights, press again to turn off.

Or, check out our power jack with multiple switches added on: Jack with Switch

Wired Connector

Easily change from 3V wall adapter over to battery and back!

If you like to run your lights on wall power, and still want the flexibility to sometimes run on AA batteries whenever you are not near a wall outlet, we have a solution.

AA power transformer with connector

Regulated Power Adapters

No more bulky, heavy, heat generating, transformers! This new high speed digital switching circuitry shrinks both the size and weight of the transformer! It also greatly reduces heat "losses", and increases the available output power. The result is much higher efficiency as well as a much more tightly regulated output voltage.

By comparison, A non-regulated adapter can put out up to 5 volts of power, which is too much for 3 volt LEDs. We do NOT recommend connecting our 3 Volt LEDs to a non-regulated adapter as the potential output voltage would be too high. This Transformer is one of the newer "switching adapters" which regulate the output voltage without all of that heat the older adapters can produce.

Related Items You May Need

Shrink Tube - Shrink Tube provides a nice solution for protecting the exposed wire connections.

Extra Kynar Wire - The same strong, flexible wire we use on all of our bulb-style LEDs.

International Plug Adapters - Use our power adapters no matter where you live.

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