2 channel relay module 5V/12V with optocoupler isolation — Arduino compatible

The 2 Channel Relay Module gives you independent control of two high-voltage AC or DC loads from a single microcontroller output. Each channel features optocoupler isolation between the control circuit and the relay coil, protecting your microcontroller from voltage spikes and noise. With SPDT relay contacts rated at 250V AC / 10A per channel, this module is suitable for switching mains-voltage appliances, motors, solenoids, and other high-power loads safely from a 5V or 12V logic signal.

Key Features:

• 2 independent relay channels — control two loads simultaneously
• Optocoupler isolated input — protects microcontroller from relay switching noise
• SPDT relay contacts: COM, NO (Normally Open), NC (Normally Closed)
• LED indicator per channel for visual status feedback
• Active-low trigger by default (LOW signal = relay ON)
• Available in 5V and 12V control voltage variants
• Standard 2.54mm pitch header for easy wiring

Electrical Specifications:

• Control voltage: 5V DC or 12V DC (select variant)
• Relay type: SPDT (Single Pole Double Throw)
• Max AC load: 250V AC / 10A per channel
• Max DC load: 30V DC / 10A per channel
• PCB dimensions: ~75mm × 35mm
• Operating temperature: -40°C to +85°C

Compatible With:

• Arduino Uno, Nano, Mega
• ESP32 and ESP8266
• Raspberry Pi (all models)
• NodeMCU and other 3.3V/5V microcontrollers

Applications:

• Home automation (light, fan, appliance switching)
• Industrial control systems
• Motor on/off control
• Solenoid valve control
• IoT smart switch projects

Safety Note: When switching mains voltage (220V AC), ensure all high-voltage wiring is properly insulated and handled by a qualified person. Do not touch live terminals.