This 5VDC 1-Way (1-Channel) Relay Module with Coupling Protection is a versatile and easy-to-use switching interface designed for microcontrollers, development boards (like Arduino, ESP32, Raspberry Pi with 5V logic), and automated systems. It allows low-voltage digital signals to control a high-voltage load safely, with built-in isolation and protection circuitry that helps safeguard your controller from voltage spikes and noise.

Whether you’re switching lights, motors, fans, solenoids, or other devices, this relay module provides reliable control with a clean separation between the control circuit and the load circuit.

Key Features

• Operates on 5V DC control signal — fully compatible with 5V logic devices
• 1 channel (1 relay) for switching a single load
• Optocoupler isolation (coupling protection) — protects the microcontroller from voltage spikes and electrical noise
• Standard terminal blocks for load connections
• Easy to integrate into Arduino, microcontroller, and automation projects
• LED indicator shows relay activation status
• Compact PCB module — ideal for electronics and robotics

Specifications

• Operating Voltage: 5V DC
• Control Input: 5V logic (active LOW or HIGH depending on module type)
• Channels: 1 (single relay)
• Relay Type: Electromagnetic SPDT (Single Pole Double Throw)
• Contact Ratings: Typically up to 10A @ 250VAC / 10A @ 30VDC (verify exact module spec)
• Isolation: Optocoupler (coupling protection)
• Indicator: Status LED
• Mounting: PCB module, screw terminal connectors
• Compatibility: Arduino, AVR, PIC, 8051, ARM, Raspberry Pi (5V logic), ESP32/ESP8266 with level shifting

Typical Applications

• Switching AC loads (lamps, fans, heaters)
• Controlling DC loads (motors, pumps)
• Home automation and IoT projects
• Robotics actuators and power control
• Alarm and security systems
• Relay control via digital outputs