4-Channel 5V Low-Trigger SSR Solid-State Relay Module for Arduino

4-Channel 5V Low-Trigger SSR Relay Module for Arduino, ESP8266, ESP32, and Raspberry Pi

The 4-channel 5V SSR solid-state relay is a reliable module designed to control devices using popular microcontrollers such as AVR, ARM, Arduino, STM32, ESP8266, ESP32, and Raspberry Pi. Thanks to the absence of mechanical components, the module features a significantly longer service life and silent operation compared to traditional electromagnetic relays.

The device ensures complete safety of the control system thanks to the use of galvanic isolation between the input and output circuits.

Key Technical Features

• Number of relays: 4 channels
• Relay supply voltage: 5 V
• Active state: Low (Low Trig)
• Contact type: Normally Open (NO)
• Maximum load on working contacts: 2 A, 250 V AC

Benefits

• High reliability: The absence of wear-prone mechanical parts ensures long-lasting and trouble-free operation of the system.
• Silent operation: State switching is completely silent, making it ideal for home projects.
• System safety: Built-in galvanic isolation effectively protects the control microcontroller from dangerous overvoltages.
• Wide compatibility: Seamless integration with many microcontroller platforms (Arduino, ESP8266, ESP32, Raspberry Pi).
• Operating speed: Solid-state relays offer a significantly shorter response time to a control signal than their mechanical counterparts.

Example Applications

• Controlling 230V mains lighting in smart home systems.
• Switching low-power heating elements.
• Contactless control of solenoid valves and small pumps.
• Home automation and advanced microcontroller-based projects.
• DIY projects requiring quiet and reliable switching of AC loads.