1CH Active HL 3V OptoCoupler Relay Module

The 1 Channel Active High/Low 3V OptoCoupler Relay Module is designed for low-voltage logic systems that require reliable electrical isolation. With integrated optocoupler isolation, it protects sensitive microcontrollers from voltage spikes, noise, and back EMF generated by connected loads.

Operating at 3V logic level, this module is fully compatible with ESP8266, ESP32, Raspberry Pi, and other 3.3V microcontroller platforms. It supports both active high and active low triggering, allowing flexible integration into various control systems.

This relay module is ideal for IoT applications, automation systems, and embedded control projects where safe and stable switching of external devices is required.