4 Channel Relay Board

  • Rajkumar Sharma
  • 53855
  • easy
  • Tested


Quad Channel Relay Board is a simple and convenient way to interface 4 relays for switching application in your project.


  • Input supply 12 VDC @ 170 mA
  • Output four SPDT relay
  • Relay specification 5 A @ 230 VAC
  • Trigger level 2 ~ 5 VDC
  • Berg pins for connecting power and trigger voltage
  • LED on each channel indicates relay status
  • Power Battery Terminal (PBT) for easy relay output and aux power connection
  • Four mounting holes of 3.2 mm each
  • PCB dimensions 88 mm x 68 mm

Applications: Robotics, Electronics projects, Industrial controls, Microwaves Oven, Fans, DC Motor, AC Lamp, Solenoids Remote Controls etc.

Relay Load (Contact Capacity of Relay)

  • 7 A @ 230-250 VAC
  • 10 A @ 120 VAC
  • 10 A @ 24 VDC
  • CN1 – CN4 Connector : Relay 1 to 4 (S1 to S4) Output (Normally Open/Normally Close)
  • CN5 Connector : Control Signal Input, Trigger 2 to 5 VDC and Supply Input 12 VDC
  • D2,D4,D6,D8 : Relay On/Off LED Indication
  • CN6 Connector : Axillary Supply 12 VDC



Parts List





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Sameer Mirza

Dear sir, i am making 4-channel relay board . but during making i have a problem with capacitor (like which type of capacitor is ? and how many volts ?). i want to know the capacitor detail used in 4-channel relay board .plz help me…

Nicos Karalis

Can you explain why the capacitors? I found no relay module on the market that uses a capacitor.What is the need for it?

Ravi Ravnang

Hi,please provide the Gerber file


Sir can i use 5v relay instead of 12v with the same


there is no connection detail for vcc and gnd for any nodemacu or arduino connection


which software you have used


How to connect the board to arduino uno.
No details for VCC and gnd for any arduino boards
How to connect the relay board with 12 v connection and then with the arduino uno.
Pls help me out.

tompai jr.

Sir,,what if we want to build,some like this,but used relay,,anyway i need the out put is lamp and bell,,but,just one switch may turn on first and the other is off..it seems like quiz..please made some like that.Thanks


sir can i ask, what is that SIP6, and CN?

Hasmukh Goswami

Sir please tell me I won’t to operate this pcb in 12v but after give supply then S1s2s3s4 which link I give GND ro +v

Hasmukh Goswami

Sir this circuit 24 hor going to work but I won’t to ask you there is possible to work


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