4-Channel Relay Board | AC250V/DC30V@10A


  • Easily add 4×independent high-current relay modules (AC250V 10A; DC30V 10A) to your project!
  • Status-indication LEDs are included for each relay
  • Opto-isolated control inputs require 15~20mA driving current
  • Connects directly to digital outputs of your favorite microcontroller board (Arduino, ESP8266, ARM) or single-board computer (Raspberry Pi, Beaglebone)



This 4-channel relay interface board allows you to control different appliances and equipment that use high-current draws using low voltage outputs such as those used by microcontrollers like Arduino (ATmegas, ARMs) and ESP8266 development boards, or by SoCs like the ones on a Raspberry Pi or BeagleBone single-board computer.

These modules are very straight-forward to use, you connect the pin header to power (5V and Ground) and to the digital I/O of your microcontroller or SoC. Then, you use the screw terminals to connect the HOT/LIVE wires of your appliance and its supply. The supply wire goes into the COMMON terminal (located in the middle of each 3-pin terminal), and the HOT/LIVE wire goes into either the NO or the NC terminal located besides each the COMMON terminal. Depending on the logic level on the microcontroller/SoC side, the COMMON terminal is connected to either the NO or the NC terminal and can be switched back and forth by firmware/program’s logic.

Please remember to always use proper precautions when working with high-current devices!


  • 7.5×5.5cm breakout PCB for 4 independent, high-current relay modules!
  • Sturdy (1.6mm), blue PCB with a 6-pin header on one side (Vdd, Vss, IN1~4) and 4×3-pin screw terminals on the other (NO, COMMON and NC)

Additional information

Product Dimensions

2.95 x 2.17 x 0.79 inches

Item Weight

1.58 ounces



Item model number


Customer Reviews

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Best Sellers Rank

#5,510 in Single Board Computers (Computers & Accessories)

Date First Available

April 3, 2017




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