4 Channel Relay Module 12 V
₹148.68 incl. GST (₹126.00 + GST)
The DC 12V 4-Channel Relay Module is a compact relay interface board designed to control multiple AC or DC loads using Arduino, PIC, AVR, ARM, DSP, PLC, and other microcontrollers. It features 4 optocoupler-isolated channels, low-level trigger inputs, and individual relay status LEDs for easy monitoring. Each relay supports up to 250V AC/10A or 30V DC/10A, making it suitable for home automation, industrial control, lighting, motors, pumps, and DIY electronics projects.
Product Description
The DC 12V 4-Channel Relay Module with Optocoupler is a high-quality relay interface board designed to control multiple electrical appliances and high-current loads using microcontrollers and control systems. It features four independent relay channels with low-level trigger inputs, making it suitable for Arduino, PIC, AVR, ARM, DSP, 8051, MSP430, PLC, and other compatible systems.
Each relay channel requires approximately 50–60mA driver current and provides a switching capacity of up to 250V AC at 10A or 30V DC at 10A. Onboard LED indicators provide visual feedback of relay output status, making testing and troubleshooting easier.
The module provides IN1, IN2, IN3, and IN4 control inputs and can be powered through the VCC and GND terminals. Its compact design makes it suitable for industrial control, smart home automation, DIY electronics, and embedded control applications.
Features
- 4 independent relay channels
- DC 12V relay operation
- Optocoupler isolation
- Low-level trigger inputs
- High-current relays
- Relay rating up to 250V AC / 10A
- Relay rating up to 30V DC / 10A
- Individual relay status indicator LEDs
- IN1–IN4 control inputs
- VCC and GND power connections
- Compatible with multiple microcontroller platforms
- Suitable for PLC and industrial control
- Compact and easy-to-install design
Specifications
| Parameter | Specification |
|---|---|
| Product Type | 4-Channel Relay Module |
| Relay Channels | 4 |
| Relay Voltage | 12V DC |
| Trigger Type | Low Level |
| Driver Current | 50–60 mA per relay |
| Isolation | Optocoupler |
| AC Switching Capacity | 250V AC @ 10A |
| DC Switching Capacity | 30V DC @ 10A |
| Control Inputs | IN1, IN2, IN3, IN4 |
| Power Input | VCC, GND |
| Status Indicators | Relay Output LEDs |
| Module Dimensions | 75 × 56 × 18 mm |
| Approx. Dimensions (inches) | 2.95 × 2.2 × 0.7 in |
Pin Configuration
| Pin | Function |
|---|---|
| VCC | 12V DC power input |
| GND | Ground |
| IN1 | Relay Channel 1 control input |
| IN2 | Relay Channel 2 control input |
| IN3 | Relay Channel 3 control input |
| IN4 | Relay Channel 4 control input |
Design and Construction
The module features a compact PCB containing four relays, optocoupler isolation circuitry, driver components, and individual LED indicators. The separate relay channels allow multiple electrical devices or circuits to be independently controlled.
The onboard indicator LEDs provide a visual indication of the corresponding relay output status. The compact 75 × 56 × 18 mm design makes the module convenient for installation in automation panels, enclosures, robotic systems, and DIY projects.
Working Principle
The relay module receives control signals through IN1–IN4 from a connected microcontroller or control system. The inputs use low-level triggering, so the corresponding relay is activated when its input receives a LOW signal.
When activated, the relay switches its output contacts, allowing the connected electrical load to be turned ON or OFF. The optocoupler provides electrical isolation between the input control circuitry and relay section, helping reduce interference and improve system reliability.
Applications
- Arduino projects
- 8051 projects
- AVR microcontrollers
- PIC microcontrollers
- ARM systems
- DSP applications
- MSP430 projects
- PLC control
- Industrial automation
- Smart home automation
- Appliance control
- Lighting control
- Fan control
- Pump control
- Motor switching
- DIY electronics
- Embedded control systems
Compatible Platforms
- Arduino
- 8051
- AVR
- PIC
- ARM
- DSP
- MSP430
- PLC systems
- Other compatible microcontrollers and TTL logic systems
Package Includes
- 1 × DC 12V 4-Channel Relay Module with Optocoupler
Product Disclaimer
The stated relay ratings represent the specified maximum switching capacity. The actual suitable load depends on the load type, switching frequency, wiring, and operating conditions. Inductive loads such as motors and pumps may require additional protection.
High-voltage AC loads can be hazardous. Use proper insulation, wiring, fusing, and electrical safety precautions when connecting mains-powered devices.
Product images are for representation only. The actual product may differ slightly in appearance, colour, component placement, or terminal configuration depending on the manufacturing batch.
FAQs – DC 12V 4-Channel Relay Module with Optocoupler
1. What is the 12V 4-Channel Relay Module used for?
It is used to control multiple AC or DC electrical loads such as lights, fans, pumps, motors, and appliances using a microcontroller or control system.
2. How many devices can it control?
The module has 4 independent relay channels, allowing four separate loads to be controlled.
3. What is the relay operating voltage?
The relay section operates at 12V DC.
4. What type of trigger does it use?
It uses a low-level trigger, meaning the relay is activated when the corresponding input receives a LOW signal.
5. What is the switching capacity of each relay?
Each relay can switch up to 250V AC at 10A or 30V DC at 10A.
6. What is optocoupler isolation?
Optocoupler isolation separates the control circuit from the relay circuit, helping reduce electrical interference and improving protection.
7. What are IN1, IN2, IN3, and IN4?
These are the four individual relay control inputs, with each input controlling its corresponding relay channel.
8. Does the module have status indicators?
Yes. Individual LED indicators show the output status of each relay.
9. Can it be used with Arduino?
Yes. It can be used with Arduino and other compatible microcontroller platforms with suitable power and signal connections.
10. Which controllers are compatible with this module?
It can be used with Arduino, 8051, AVR, PIC, ARM, DSP, MSP430, PLC systems, and other compatible control platforms.
11. What are VCC and GND used for?
VCC is the power input and GND is the ground connection for the module.
12. What types of loads can it control?
It can control compatible lights, fans, pumps, motors, solenoids, appliances, and other electrical loads.
13. Does the relay module directly power the connected load?
No. The relay acts as a switch. The connected load requires its own suitable power supply.
14. What is the size of the module?
The module measures approximately 75 × 56 × 18 mm.
15. What is the driver current per relay?
Each relay requires approximately 50–60mA driver current.
16. What are the main applications?
It is suitable for home automation, industrial control, PLC projects, robotics, smart home systems, appliance control, and DIY electronics.
17. Can it control high-voltage AC appliances?
Yes, within the specified relay rating. High-voltage wiring should always be performed with appropriate electrical safety precautions.
18. What is included in the package?
The package includes 1 × DC 12V 4-Channel Relay Module with Optocoupler.
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