4 Channel Relay Board

  • Rajkumar Sharma
  • 49595
  • 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






  • 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…

    3 years ago
    • admin

      If you are reffering to C1, then a simple ceramic capacitor will do it’s job.

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

    3 years ago
    • admin

      The capacitors are used for noise filtering of the power supply. If you use a filtered power supply you may omit them.

      3 years ago
  • Ravi Ravnang

    Hi,please provide the Gerber file

    2 years ago
    • As requested, I’ve uploaded Gerber files above. Thanks

      2 years ago
  • usaid

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

    2 years ago
    • Yes, you can use 5V relays with 5V input.

      2 years ago
  • smit

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

    2 years ago
    • You can interface any microcontroller board through the CN5 connector. What’s your point?

      2 years ago
  • amin

    which software you have used

    2 years ago
    • The board has been designed with Cadence Orcad.

      2 years ago
  • Karthi

    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.

    2 years ago
  • 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

    1 year ago
    • Sorry, i don’t understand your question. Please better explain.

      1 year ago
  • Tyralee

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

    10 months ago
    • SIP6 is a 6 pin connector as shown in photos and CN is the connector name, CN1, CN2 etc

      10 months ago

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