Keyestudio 4 Channel 5V Relay Module for Arduino

Keyestudio 4 Channel 5V Relay Module for Arduino

The Keyestudio 4 Channel 5V Relay Module is a high-performance relay control board designed for Arduino, Raspberry Pi, ESP32, PIC, AVR, STM32, and other microcontroller platforms. It allows low-voltage control of high-voltage AC or DC devices such as lights, fans, motors, pumps, and home appliances safely and efficiently.

This module features four independent 5V relays capable of switching high-current loads up to 10A. Each relay channel includes an LED status indicator for easy monitoring and troubleshooting during operation. The board uses TTL control signals and can be directly connected to microcontroller digital output pins for simple integration into automation and IoT projects.

Keyestudio Relay 4 channel 5V Shield Module KS0251

The modular design makes the relay board easy to install and suitable for DIY electronics, industrial control systems, smart home automation, and robotics applications. The relay outputs support both Normally Open (NO) and Normally Closed (NC) configurations for flexible switching operations.

Features

• 4 independent relay channels
• Operates on 5V DC
• Compatible with Arduino and Raspberry Pi
• LED indicators for relay status
• Supports AC and DC load switching
• TTL logic control input
• Easy screw terminal connections
• Compact and durable PCB design

Technical Specifications

• Operating Voltage: 5V DC
• Relay Channels: 4
• Trigger Type: HIGH level trigger
• Max Switching Voltage: 250VAC / 30VDC
• Max Switching Current: 10A
• Contact Type: NO / NC / COM
• Control Signal: TTL compatible
• Response Time: <10ms

Applications

• Home automation systems
• Smart lighting control
• Motor and pump control
• Industrial automation
• Arduino DIY projects
• Robotics systems
• Security and alarm systems
• IoT switching applications