Relay Module 4-Channel 5V

Description 4-channel relay board that allows you to control up to four high-voltage devices using Arduino, ESP8266/ESP32, PLC, or any microcontroller. Built with optocoupler isolation to protect your controller from electrical noise and high voltage. ⚙️ Specifications Channels: 4 Relays Operating Voltage: 5V DC Isolation Type: Optocoupler Isolation Trigger Mode: Selectable High-Level or Low-Level Trigger Status LED indicator for each channel Relay Terminals: COM / NO / NC Contact Rating (per relay): 10A @ 250V AC 10A @ 30V DC �� Pins VCC → 5V supply GND → Ground IN1 – IN4 → Control signals from microcontroller JD-VCC → Separate relay power (optional isolation)