Relay Module (4 Channels - 5V)

Overview

Control high-power devices safely with the MOKWN 4-Channel 5V Relay Module. This Arduino-compatible relay board lets you switch up to four AC or DC loads—like lights, fans, pumps, or solenoid valves—using the low-voltage signals from your microcontroller. With optocoupler isolation and transistor drivers, it provides reliable, safe switching for your projects, from home automation to industrial control.

Key Features

• 4 Independent Relay Channels: Control up to four separate devices with a single board.
• Optocoupler Isolation: Protects your microcontroller from voltage spikes and electrical noise.
• High Switching Capacity: Each relay can handle 10A at 250V AC or 30V DC, suitable for most household appliances and DC loads.
• LED Status Indicators: Visual feedback for each relay's state (ON/OFF).
• Transistor Drivers: Ensure reliable switching with low-power control signals.
• Standard Pin Headers: Easy to connect with jumper wires or directly to Arduino shields.
• Power and Control LEDs: Clear indication of power and relay activity.

Technical Specifications

• Relay Channels: 4
• Control Voltage: 5V DC
• Relay Rating: 10A @ 250V AC / 10A @ 30V DC
• Trigger Mode: Active LOW (jumper selectable to active HIGH)
• Isolation: Optocoupler isolated inputs
• Status Indicators: 4 relay LEDs + 1 power LED
• Connector Type: Screw terminals for load connections, pin headers for control signals
• Dimensions: Approximately 75mm x 55mm x 20mm (L x W x H)

Applications & Use Cases

• Home Automation: Control lights, fans, curtains, and other AC appliances from a smart home hub.
• Industrial Control: Switch motors, pumps, solenoids, and other machinery in automation systems.
• Robotics: Control high-power actuators, motors, or power distribution in robotics projects.
• IoT Projects: Integrate with ESP32, NodeMCU, or Raspberry Pi to control devices remotely via Wi-Fi or cloud platforms.
• Educational Projects: Teach relay control, electrical safety, and automation concepts in classrooms and labs.

What's Included

• 1x 4-Channel 5V Relay Module
• (Note: Jumper wires and power supply are not included)

Compatibility

• Microcontrollers: Arduino (Uno, Mega, Nano), ESP32, ESP8266 (NodeMCU), Raspberry Pi (with 3.3V to 5V level shifting), STM32, PIC, and other 5V logic microcontrollers.
• Software: Works with Arduino IDE, MicroPython, and any GPIO library.

MOKWN Recommendation

For most projects, we recommend using a 5V power supply (e.g., a USB adapter or a 5V buck converter) to power the relay module, and ensure your microcontroller's logic level matches the module's trigger voltage (5V). If you're using a 3.3V microcontroller like the Raspberry Pi, you may need a level shifter or use the active HIGH mode with proper wiring. This relay module is a versatile and reliable choice for both beginners and professionals.