Description
The 4-Channel Relay Module allows for controlling up to four high-voltage devices with low-voltage signals. This module is ideal for various applications such as home automation, industrial automation, and robotic control, providing the ability to switch on or off multiple devices independently . Each relay is opto-isolated, protecting your microcontroller from electrical noise and voltage spikes while providing reliable switching for AC and DC loads .
Key Features
- 4 Independent Relays – Control four separate loads with individual relay outputs
- Compatible with Microcontrollers – Works with Arduino, Raspberry Pi, ESP32, and other 3.3V/5V logic systems
- Supports Both NO and NC Contacts – Each relay provides normally open (NO) and normally closed (NC) terminals
- LED Indicators – Individual LED for each relay channel shows power and relay status
- Opto-Isolated Inputs – Protects your microcontroller from high-voltage interference and ground loops
- High/Low Level Trigger – Configurable trigger level via onboard jumper for each channel
- Can Switch Both AC and DC Loads – Suitable for mains-powered appliances and low-voltage DC devices
Technical Specifications
| Parameter | Specification |
|---|---|
| Relay Type | Electromechanical SPDT (Single Pole Double Throw) |
| Operating Voltage | 5V DC |
| Trigger Voltage (High) | 2.5V – 5V DC |
| Trigger Voltage (Low) | 0 – 1.5V DC |
| Trigger Current | 2 – 5mA per channel |
| Relay Coil Current | ~60mA per relay (at 5V) |
| Quiescent Current | 5mA |
| Max Current | 190mA |
| Relay Contact Rating | 10A @ 250VAC / 10A @ 30VDC |
| Isolation | Optocoupler-based |
| Action Time | <10ms |
| Release Time | <5ms |
| Dimensions | ~73mm × 50mm × 19mm |
| Operating Temperature | -40°C to +85°C |
Applications
- Home Automation Systems: Control lights, fans, and appliances
- Industrial Control Systems: Switching machinery and equipment
- Robotics: Motor and actuator control
- HVAC Systems: Control heating, ventilation, and air conditioning equipment
- Security Systems: Alarm and access control integration
- Remote Control of Devices: IoT and smart home projects