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Multi-Channel Relay Module 5V/12V/24V — Optocoupler, High/Low Trigger, Arduino
Multi-Channel Relay Module 5V/12V/24V Optocoupler, High/Low Trigger, Arduino
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Multi-Channel Relay Module — 5V / 12V / 24V, Optocoupler Isolated
A versatile optocoupler-isolated relay module available in 1 to 16 channel configurations with coil voltage options of 5V, 12V, or 24V. Each relay features SPDT (Single Pole Double Throw) contacts rated at AC 250V/10A and DC 30V/10A, making it suitable for controlling mains-voltage loads from low-voltage microcontrollers including Arduino, ESP32, STM32, and Raspberry Pi.
Key Specifications
| Parameter | Value |
|---|---|
| Coil Voltage Options | 5V / 12V / 24V DC |
| Channel Options | 1 / 2 / 4 / 6 / 8 / 12 / 16 |
| Contact Rating (AC) | 250V / 10A |
| Contact Rating (DC) | 30V / 10A |
| Contact Type | SPDT (NO / COM / NC) |
| Trigger Level | High or Low (selectable) |
| Isolation | Optocoupler (PC817 or equivalent) |
| Power Dissipation | 5W per relay |
| Operating Temperature | -40°C to +85°C |
| Indicator LEDs | Yes (per channel) |
| Origin | Mainland China |
Why Choose This Relay Module?
- Optocoupler isolation — protects microcontroller GPIO from high-voltage transients and noise
- High/Low trigger selectable — compatible with both active-high and active-low GPIO logic
- 5V / 12V / 24V coil options — matches your system power supply without extra converters
- SPDT contacts — use NO (normally open) or NC (normally closed) for fail-safe designs
- Per-channel LED indicators — instant visual feedback on relay state during testing
- 1–16 channel scalability — from single-load control to full multi-zone automation
Typical Applications
- Smart home automation — control lights, fans, and appliances from Arduino or ESP32
- Irrigation systems — multi-zone solenoid valve control for garden automation
- Industrial control — PLC output expansion, machine interlocks, and alarm systems
- HVAC control — thermostat relay switching for heating and cooling systems
- Home security — door lock, siren, and alarm relay control
- LED lighting control — high-power LED strip switching beyond GPIO current limits
Compatible With
Works with Arduino UNO, Mega, Nano, ESP8266, ESP32, STM32, Raspberry Pi, and any microcontroller with 3.3V or 5V GPIO. For 3.3V systems, use a 5V relay module with optocoupler isolation to avoid GPIO damage.
FAQ
Q: What is the difference between high-level and low-level trigger?
A: High-level trigger activates the relay when the signal pin is HIGH (3.3V/5V). Low-level trigger activates when the pin is LOW (GND). Most Arduino projects use active-low (LOW trigger) relay modules.
Q: Can I control 220V AC loads with this relay?
A: Yes. The relay contacts are rated AC 250V/10A, suitable for controlling 110V and 220V mains loads. Always follow electrical safety regulations when working with mains voltage.
Q: Do I need a separate power supply for the relay coil?
A: For multi-channel modules (4+), it is recommended to use a separate 5V/12V power supply for the relay coil VCC to avoid overloading the Arduino’s onboard regulator.
Package Contents
- 1× Multi-Channel Relay Module (channel count and coil voltage as selected)
- ★Product Description
- ★About us
- ★Custom cable
Multi-Channel Relay Module — 5V / 12V / 24V, Optocoupler Isolated
A versatile optocoupler-isolated relay module available in 1 to 16 channel configurations with coil voltage options of 5V, 12V, or 24V. Each relay features SPDT (Single Pole Double Throw) contacts rated at AC 250V/10A and DC 30V/10A, making it suitable for controlling mains-voltage loads from low-voltage microcontrollers including Arduino, ESP32, STM32, and Raspberry Pi.
Key Specifications
| Parameter | Value |
|---|---|
| Coil Voltage Options | 5V / 12V / 24V DC |
| Channel Options | 1 / 2 / 4 / 6 / 8 / 12 / 16 |
| Contact Rating (AC) | 250V / 10A |
| Contact Rating (DC) | 30V / 10A |
| Contact Type | SPDT (NO / COM / NC) |
| Trigger Level | High or Low (selectable) |
| Isolation | Optocoupler (PC817 or equivalent) |
| Power Dissipation | 5W per relay |
| Operating Temperature | -40°C to +85°C |
| Indicator LEDs | Yes (per channel) |
| Origin | Mainland China |
Why Choose This Relay Module?
- Optocoupler isolation — protects microcontroller GPIO from high-voltage transients and noise
- High/Low trigger selectable — compatible with both active-high and active-low GPIO logic
- 5V / 12V / 24V coil options — matches your system power supply without extra converters
- SPDT contacts — use NO (normally open) or NC (normally closed) for fail-safe designs
- Per-channel LED indicators — instant visual feedback on relay state during testing
- 1–16 channel scalability — from single-load control to full multi-zone automation
Typical Applications
- Smart home automation — control lights, fans, and appliances from Arduino or ESP32
- Irrigation systems — multi-zone solenoid valve control for garden automation
- Industrial control — PLC output expansion, machine interlocks, and alarm systems
- HVAC control — thermostat relay switching for heating and cooling systems
- Home security — door lock, siren, and alarm relay control
- LED lighting control — high-power LED strip switching beyond GPIO current limits
Compatible With
Works with Arduino UNO, Mega, Nano, ESP8266, ESP32, STM32, Raspberry Pi, and any microcontroller with 3.3V or 5V GPIO. For 3.3V systems, use a 5V relay module with optocoupler isolation to avoid GPIO damage.
FAQ
Q: What is the difference between high-level and low-level trigger?
A: High-level trigger activates the relay when the signal pin is HIGH (3.3V/5V). Low-level trigger activates when the pin is LOW (GND). Most Arduino projects use active-low (LOW trigger) relay modules.
Q: Can I control 220V AC loads with this relay?
A: Yes. The relay contacts are rated AC 250V/10A, suitable for controlling 110V and 220V mains loads. Always follow electrical safety regulations when working with mains voltage.
Q: Do I need a separate power supply for the relay coil?
A: For multi-channel modules (4+), it is recommended to use a separate 5V/12V power supply for the relay coil VCC to avoid overloading the Arduino’s onboard regulator.
Package Contents
- 1× Multi-Channel Relay Module (channel count and coil voltage as selected)
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