The 8 Channel 5V Relay Module is a multi-load switching board used to control 8 different AC/DC devices using controllers like Arduino, ESP32, ESP8266, Raspberry Pi, or PLC systems. It comes with 8 independent electromagnetic relays, each having NO/NC/COM terminals for flexible wiring. This module is widely used in home automation, industrial switching, smart appliances control, and robotics power switching.
Core Module Features
• Relay Channels: 8 independent relays
• Relay Coil Voltage: 5V DC (module power)
• Control Inputs: IN1 to IN8 (digital trigger pins)
• Output Type: Mechanical relay switching (NO/NC/COM)
• Status Indication: LED indicator per relay channel
Electrical & Interface
• Operating Voltage: 5V DC
• Trigger Signal Level: 3.3V / 5V TTL compatible (depends on board type)
• Input Pins: IN1, IN2, IN3, IN4, IN5, IN6, IN7, IN8
• Output Terminals: COM, NO, NC for each relay
• Onboard Driver: Transistor driver + protection circuit (common design)
• Power Terminals: VCC / GND (and sometimes JD-VCC on opto boards)
Load & Switching Capacity
• Max Switching Load (Typical):
– 250VAC @ 10A
– 30VDC @ 10A
• Suitable for: lights, fans, pumps, solenoids, motors (within rating)
• Screw terminals provide strong and safe wire grip
Physical & Integration
• Compact 8-relay PCB layout for easy mounting
• LED indicators help quick debugging and status check
• Usually includes jumper headers for easy microcontroller connection
• Best for switching multiple appliances from one controller
Applications
• Home automation relay panel
• Smart switch board / IoT switching system
• Industrial control relays
• Arduino/ESP32 multi-device control
• AC appliance switching & DC load control
Pro Tip
• Use a stable 5V power supply (USB power may fail when multiple relays ON)
• For inductive loads (motor/pump), use proper protection & relay rating margin
• Keep AC mains wiring isolated from control wiring for safety
• If your board has JD-VCC, use separate relay power for better isolation
Package Includes
• 1 × 8 Channel 5V Relay Module