2 Channel Solid State Relay Module SSR 5V Low Level Trigger 2A 240V AC for Arduino & Smart Home

Overview

The 2-Channel SSR Module is a premium switching board that allows your microcontroller to control high-voltage AC loads safely. Unlike standard mechanical relays that make a loud click sound and wear out over time, this Solid State Relay uses semiconductor technology. This means zero friction, zero mechanical noise, and extremely fast switching speeds. It features a built-in resistive fuse to protect your control circuit from high-power surges, making it ideal for continuous, long-term industrial panels and smart-home automation.

Key Features

• 100% Silent Operation: No clicking sounds, making it perfect for indoor automation, bedrooms, or studio projects.

• Zero-Cross Triggering: Switches at the zero-voltage point of the AC cycle to minimize electrical noise and prevent power spikes.

• Safe Optoisolation: Complete optical isolation between the low-voltage input (Arduino/ESP32) and the high-voltage AC output.

• Low-Level Trigger: Activated when the input signal goes LOW (0V), ensuring stable trigger logic from standard microcontrollers.

Technical Specifications

Important Compatibility Note2 Channel Solid State Relay Module SSR

• AC Loads Only: Solid State Relays use a TRIAC at the output, which means they only work with AC appliances (like fans, lights, or heaters). They will not turn off if connected to a DC load (like a 12V battery or motor).

• Resistive vs. Inductive: It safely handles up to 2A for resistive loads (lamps, heating elements). For highly inductive loads (large AC motors or heavy transformers), limit the current to 1A to avoid overheating.