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4 channel 5V relay module with light coupling 5V

4 channel 5V relay module with light coupling 5V

We have ✅ 20 available of the LB-LR0051 in our Sydney warehouse. An extra 1000 units available with a short lead time.

Express post delivery (2-5 business days)

A 4-channel relay module with opto-isolated inputs for safe, reliable switching of high-power loads. Each relay is rated for up to 10A at 250VAC or 30VDC, making it suitable for controlling lights, motors, heaters, and other mains-powered devices from a microcontroller.

The opto-isolators protect your microcontroller from electrical noise and voltage spikes, while requiring only 2mA per channel to trigger. Although designed for 5V logic, the module also works reliably with 3.3V systems.

Key Features

  • 4 Independent Channels – Control four separate loads with individual relay outputs
  • Opto-Isolated Inputs – Protects your microcontroller from high-voltage interference and ground loops
  • Low Input Current – Only 2mA per channel, safe for direct microcontroller connection
  • 3.3V/5V Compatible – Works with both 3.3V and 5V logic levels
  • High-Power Switching – Each relay rated for 10A @ 250VAC / 10A @ 30VDC
  • NO and NC Contacts – Each relay provides both normally-open and normally-closed terminals
  • Status LEDs – Individual LED indicators show when each relay is energised
  • Test Jumper – Disconnect VCC to test logic without activating relays

Ideal For

  • Home automation and smart lighting control
  • Arduino, Raspberry Pi, and ESP32 projects
  • Controlling motors, pumps, and solenoids
  • Switching mains-powered appliances
  • Industrial and PLC control applications
Warning: This module can switch mains voltage (240VAC). Ensure all high-voltage wiring is performed by a qualified electrician and housed in an appropriate enclosure.

Specifications

  • Channels – 4
  • Supply Voltage – 5V DC (also works at 3.3V)
  • Input Logic – Active LOW (relay activates when input is pulled low)
  • Input Current – 2mA per channel (opto-isolator/LED)
  • Relay Coil Current – 60mA per relay
  • Contact Rating – 10A @ 250VAC / 10A @ 30VDC
  • Contact Type – SPDT (NO + NC + COM per channel)
  • Dimensions – 73 × 54 × 19mm

Pinout

  • VCC – 5V power supply
  • GND – Ground
  • IN1–IN4 – Control inputs (active LOW)
  • COM – Common contact (one per relay)
  • NO – Normally Open contact
  • NC – Normally Closed contact

The 4 channel 5V relay module with light coupling 5V appears in the following collections:

SKU LB-LR0051
by Little Bird