Relay Module 5V DC 1-Channel

The 5V DC 1-Channel Relay Module is an essential interface for switching high-voltage or high-current devices — such as motors, lamps, pumps, and home appliances — from low-voltage microcontrollers like Arduino, Raspberry Pi, ESP32, and PIC. It accepts a standard 5V digital signal (HIGH/LOW or PWM) on its IN pin and uses that signal to energize an electromechanical relay capable of switching loads up to 250V AC or 30V DC at 10A.

A built-in optocoupler electrically isolates the microcontroller side from the relay/load side, protecting your control electronics from voltage spikes and back-EMF. Screw terminals on the output side make it easy to wire AC or DC loads, while an onboard LED indicator clearly shows when the relay is energized — useful for testing and debugging.

The compact form factor and standard 3-pin control interface (VCC, GND, IN) make this module ideal for home automation, IoT projects, and any application where a microcontroller needs to drive real-world power loads.

Specifications

• Operating Voltage: 5V DC
• Input Signal: 5V logic (HIGH/LOW or PWM)
• Relay Contact Rating: 10A @ 250V AC / 10A @ 30V DC
• Channels: 1
• Isolation: Built-in optocoupler
• Control Interface: 3-pin header — VCC, GND, IN
• Load Connection: Screw terminals (NO, COM, NC)
• Indicator: Onboard LED for relay status
• Compatible With: Arduino, Raspberry Pi, ESP32, ESP8266, PIC, and other 5V/3.3V microcontrollers

Applications

• Home automation and smart home systems
• IoT devices and remote-controlled appliances
• Switching lights, fans, pumps, and motors
• Arduino / Raspberry Pi / ESP32 control projects
• Security systems — alarms, electric locks, sirens
• Industrial automation and equipment control
• DIY electronics and prototyping