2CH Relay 12VDC

A 2-channel 12 V relay module with optocoupler isolation — allowing a microcontroller to switch two independent AC or DC loads. Both channels provide NO and NC contacts, LED status indicators, and full electrical isolation via optocouplers. The essential building block for home automation and control projects.

🔹 Key Applications

• Home automation 2-zone switching
• Arduino-controlled appliance on/off control
• Water pump and solenoid valve control
• Two-stage alarm system switching
• Motorised actuator direction control
• Sequential power switching in automated test systems

🔹 Why Choose This Module?

• 2 independent channels — control two separate loads
• Optocoupler isolation — MCU protected from load voltage
• NO and NC contacts — maximum wiring flexibility
• LED status indicators — instant visual state confirmation
• 12 V coil — powered from standard Arduino power supply

🔹 Technical Specifications

• Channels: 2
• Coil Voltage: 12 V DC
• Contact Rating: 10 A / 250 V AC or 10 A / 30 V DC
• Isolation: Optocoupled
• Trigger: Active LOW
• Indicators: LED per channel

🔹 What's Included

1 × 2-Channel 12V DC Relay Module

🔹 Pro Tip

💡 Connect JD-VCC to your 12 V relay supply and VCC to your Arduino's 5 V to keep the optocoupler and relay power rails separate — this is the correct configuration for full isolation. Don't connect JD-VCC to Arduino 5 V; the relay coils draw too much current for the Arduino's regulator.

⚠️ Note: Always ensure proper heat dissipation and correct voltage configuration before powering connected devices.