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Five small green circuit boards each with a blue relay cube and white terminal blocks

DIXSG

DIXSG 1-Channel Optocoupler 3V/3.3V Relay Module Pack of 5

SKU CH-R2R0-G5VE9

Five 3 V or 3.3 V relay boards with optocoupler isolation switch 10 A loads up to 250 VAC or 30 VDC

  • Optocoupler isolation protects the control circuit
  • 3 V logic drive works with Arduino IO pins
  • High-level trigger simplifies firmware logic
  • 10 A at 250 V AC switches mains loads
  • 100000-cycle relay rating supports long-term use

Optocoupler Relay Module for Microcontrollers

The DIXSG 1-channel relay board uses an EL817 optocoupler to isolate a 3 V or 3.3 V logic signal from the switched load. Each module in the pack of five drives a Songle relay rated for 10 A at 250 VAC or 30 VDC. High-level triggering lets a microcontroller IO pin activate the relay directly without additional driver circuitry.

Switching Limits and Isolation

The relay contacts handle resistive loads up to 10 A at 250 VAC and 10 A at 30 VDC. Photocoupler isolation separates the low-voltage control side from the mains-voltage load side, protecting the microcontroller from transients. Response time is under 20 milliseconds, and the relay is rated for 100000 continuous operations. The module accepts a DC control voltage range up to 25 V.

Upgrading from Bare Relay Wiring

Builders moving from hand-wired relay circuits gain a fixed mounting hole, screw-terminal connections and a jumper-selectable shared or separate power supply. The integrated diode protects the driver from coil back-EMF. The board does not suit applications needing low-level triggering, multiple channels on one PCB or logic voltages below 3 V.

Highlights

  • Optocoupler isolation protects the control circuit
  • 3 V logic drive works with Arduino IO pins
  • High-level trigger simplifies firmware logic
  • 10 A at 250 V AC switches mains loads
  • 100000-cycle relay rating supports long-term use

Specifications

No published specifications for this item yet.

Questions about this item

Should I choose the 3 V or the 3.3 V version for my microcontroller?

The module operates at either 3 V or 3.3 V, so select the voltage that matches your microcontroller logic level.

What does the 10 A rating mean when the relay is switching mains voltage?

It can switch up to 10 A at 250 V AC, suitable for typical household appliances.

How does the optocoupler isolation affect the control signal voltage?

The EL817 optocoupler isolates the control side, allowing a 3 V or 3.3 V high-level signal to drive the relay safely.

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