Product Description
The 4 Channel 5V Relay Module Board is a quad-channel optocoupler-isolated relay shield for independently controlling four high-voltage or high-current devices from a single Arduino, ESP32, Raspberry Pi, or any 5V microcontroller. Built around four JQC-3FF-S-Z relays with individually selectable high/low level triggering across all four channels, it’s the most popular relay module size for home automation, industrial control panels, and multi-device IoT projects.
Board Features:
- 4 independent relay channels — quad JQC-3FF-S-Z relays (10A rated each)
- Optocoupler isolation on all 4 channels — full electrical barrier between control and load
- 1-4 Road high/low level trigger select terminal — configurable per channel
- Relay output screw terminals per channel: NO / COM / NC
- Power supply and signal triggering end clearly labeled
- LED indicator per channel — visual relay state confirmation
- Mounting holes for panel or enclosure installation
The 4 Channel 5V Relay Module Board Shield with Optocoupler is an industrial-grade relay switching module designed for Arduino, ESP32, Raspberry Pi, and other microcontroller development platforms. It allows low-voltage control of high-voltage AC or DC devices such as lights, motors, pumps, solenoids, and home automation equipment.
The module features 4 independent relay channels with optocoupler isolation for improved protection and stable signal control. It supports both high-level and low-level trigger modes, making it suitable for a wide range of automation and embedded control applications.
Features
- 4-channel relay output module
- 5V DC operating voltage
- Optocoupler isolation protection
- Supports high-level and low-level trigger
- LED status indicators for each relay
- Compatible with Arduino and other controllers
- High-current relay switching capability
- Screw terminal connections for easy wiring
Technical Specifications
- Product Type: 4-Channel Relay Module
- Relay Channels: 4
- Operating Voltage: 5V DC
- Trigger Voltage: 5V Logic Level
- Trigger Mode:
- High-Level Trigger
- Low-Level Trigger
- Isolation Method: Optocoupler Isolation
- Relay Type: Electromagnetic Relay
- Relay Contact Type: SPDT
- Maximum Switching Voltage:
- 250V AC
- 30V DC
- Maximum Switching Current: 10A per channel
- Interface Type: Digital Control Signal
- Status Indicators: LED indicators for each relay
- Connection Type: Screw terminal blocks
- Compatible Boards:
- Arduino UNO
- Arduino Mega 2560
- ESP32
- Raspberry Pi
- STM32
- PCB Material: FR4
Applications
- Home automation systems
- Industrial automation control
- Smart switching projects
- Motor and pump control
- Lighting automation
- IoT switching systems
- Embedded control applications
- DIY electronics projects
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