The 8 Channel 12V Relay Module is a high-power switching board used to control multiple AC/DC loads using a microcontroller like Arduino, ESP32, ESP8266, Raspberry Pi, or PLC systems. It contains 8 independent relays, allowing you to switch up to 8 different devices such as lights, fans, motors, pumps, solenoids, and appliances. Each relay channel has an LED indicator for easy status monitoring and supports TTL-level trigger input.
Core Module Features
• Relay Channels: 8 independent relay outputs
• Relay Coil Voltage: 12V DC (module power)
• Control Signal: TTL compatible input pins (IN1–IN8)
• Switching Type: Electromagnetic relay (NO/NC/COM)
• Status Display: LED indicator per channel
Electrical & Interface
• Operating Voltage: 12V DC (relay coil power supply)
• Trigger Input Voltage: 3.3V / 5V logic compatible (depends on module design)
• Input Pins: IN1, IN2, IN3, IN4, IN5, IN6, IN7, IN8
• Output Terminals: COM, NO, NC for each relay
• Isolation: Optocoupler / transistor driver (varies by model)
Load & Switching Capacity
• Max Switching Voltage (Typical):
– 250VAC @ 10A
– 30VDC @ 10A
• Supports both AC and DC load switching
• Suitable for high-current appliances (within rating)
• Screw terminals for secure wiring connections
Physical & Integration
• Compact PCB with 8 relays aligned in a row
• LED indicators for relay ON/OFF status
• Easy wiring via screw terminals
• Mounting holes for panel / box installation
Applications
• Home automation (lights, fans, sockets)
• Industrial control panels and automation
• Smart switchboard systems
• Motor, pump and solenoid switching
• Multi-load control using Arduino / ESP32
Pro Tip
• Use an external 12V supply with enough current (all relays ON together need more power)
• Always keep AC mains wiring safely insulated
• Use snubber/diode protection for inductive loads (motors, solenoids)
• Ensure common ground between controller and relay module (if required)
Package Includes
• 1 × 8 Channel 12V Relay Module