Relay modules


Viewed products

16 relay module


Controle module with 16 relay onboard + optocoupler, ready to use with Arduino

More details

This product is no longer in stock

31,15 € tax incl.



Here is 16 relay board ready to use with your 5 volts based microcontroller projects.
This board is powered with 12 Volts and has a 5 volts regulator on board (LM2596S 5.0) powering the board's components.

This board does offer all the electronic to control and power the 16 relays... each one being able to commute up to 10 Amp under 250V AC (the whole thing protected with optocouplers to keep your Arduino safe and secure).

Convenient, this board will offer a galvanic isolation between the low voltage components (your Arduino) and the high voltage load (the relay + your load wired to the relay).


The relays on board are "single-pole" and "double-throw", also named "SPDT" relay.
The board is completely assembled and own its own 5V regulator (you can power it from 12V power supply).

The GND and +5V are available together with the relay control pins, so you can also power your microcontroller from the relay board :-) .

The pins follow the standard 2.54mm spacing (like breadboards). Then, you can use molex connector or dupont wires (please see our wire assortiment). The power contacts of the relays are routed to 5mm screw terminals (3 contacts terminals).

The board has 4 fixing holes (3mm diameter).


To activate a Rx relay, you have to draw the corresponding INx pin to the ground (GND).
If the potential is not driven to the ground by the microcontroler then the INx pin is pull-up to 5 volts (provided by the power supply voltage).

Warning: please note that this relay board IS NOT COMPATIBLE with the Raspberry-Pi (or 3V microcontroller) as the INx pins are pull-up to 5 Volts.

Technical details

  • A Texas Instrument LM2596S 5.0 voltage regulator .
    A DC-DC regulator (Buck Converter) Step-Down, having a good efficiency.
    Capable to provide up to 3Amp @ 5V.
    LM2596S datasheet (Pdf, Texas Instrument)
  • Power: 12 Volts via the barrel jack connector.
  • LED indicating the state of each relay.
  • Flyback diode.
  • Each relay need 63mA under 5 Volts when activated
  • Input Pin sink 3.7 mA to the ground (to activate the relay)
  • Size: 180 x 90mm (height: 18mm)

Working with higher voltage

Working with a voltage higher than 30V can be dangerous (in case of accidental contact). Higher voltage wiring should be done by skilled people. For safety reason, don't hesitate to ask help to a friend having the required "high voltage" skills.
Even rated for 230V AC, this product isn't certified for industrial use or power networks in our country. So we recommend it for low voltage usage to our makers.



Associated products

11 other products in the same category: