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
| Feature | Specification |
| Channels | 2-Channel (Independent Control) |
| Input Voltage (VCC) | 5V DC |
| Trigger Current | 12.5mA per channel |
| Output Type | AC Only (Do not use with DC loads) |
| Continuous Load Current | 2 Amperes per channel |
| Load Voltage Range | 75V to 240V AC (50Hz 60Hz) |
| Trigger Type | Low-Level Trigger |
| Dimensions | 55mm x 33mm x 25mm |
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.
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