1-Channel 5V Relay Module
- Controls AC and DC electrical loads.
- Supports up to 10A switching capacity.
Description
The 1-Channel 5V Relay Module allows microcontrollers to control external electrical devices using a low-voltage digital signal. It features an electromechanical SPDT relay with Normally Open (NO), Normally Closed (NC), and Common (COM) terminals. The common SRD-05VDC-SL-C relay version supports loads up to 10A at 250V AC or 30V DC, subject to the relay's rated conditions. The module operates from a 5V DC supply and connects through three control pins: VCC, GND, and IN. Depending on the board version, it may use active-LOW or active-HIGH triggering. Indicator LEDs show power and relay status, while some versions include optocoupler isolation. It is suitable for Arduino, ESP32, automation, robotics, and IoT projects. High-voltage wiring requires proper insulation and safety precautions.
Specifications
| Module Type | Single-channel electromechanical relay module |
|---|---|
| Operating Voltage | 5V DC |
| Relay Model | SRD-05VDC-SL-C (common version) |
| Number of Channels | 1 |
| Contact Configuration | SPDT (NO, COM, NC) |
| Maximum AC Load | 10A at 250V AC (relay rating) |
| Maximum DC Load | 10A at 30V DC (relay rating) |
| Control Interface | VCC, GND, IN |
| Trigger Type | Active LOW or HIGH, depending on board version |
| Indicators / Protection | Power and relay status LEDs; optocoupler on supported versions |