1 Channel Relay Module with light coupling 5V

The 1 Channel Relay Module with light coupling is a single 5 V relay board with an optocoupler on the input. The optocoupler separates your Arduino, ESP32 or Raspberry Pi signal from the relay coil, adding a layer of protection while a digital pin switches a separate, higher-power circuit such as a lamp, fan, pump or solenoid lock.

1 Channel Relay Module Specifications

• Channels: 1
• Relay coil voltage: 5 V DC
• Input isolation: optocoupler (light coupling)
• Output terminals: NO (normally open), COM (common) and NC (normally closed) screw terminals
• Contact rating: as printed on the relay, commonly 10 A at 250 VAC or 30 VDC
• Control: digital signal from a microcontroller pin

1 Channel Relay Module Applications

• Switching lamps, fans and pumps from Arduino or ESP32
• Home automation and smart switch projects
• Timers, thermostats and alarm outputs
• Controlling solenoid locks and DC motors on a separate supply

What's in the Box

• 1 × 1-channel 5 V relay module with optocoupler

Tip: Check the markings next to the input pins: many optocoupler relay modules switch on with a LOW signal, and some have a jumper to choose HIGH or LOW triggering. Mains voltage on the relay terminals is dangerous, so insulate the wiring, use an enclosure and never touch the board while it is connected.

Orders placed before 14:00 are ready for pickup the same day. Delivery across Lebanon usually takes 1–3 working days.