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2 Channel 5V Relay Module With Optocoupler Protection

SKU: NPLEFD5RTT
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4.3 (74 reviews)
The 2 Channel 5V Relay Module with Optocoupler Protection is a dual-channel switching module designed to control two AC or DC electrical loads independently using low-voltage signals from a microcontroller or digital control circuit. The module operates from a 5V DC supply and typically uses two SPDT electromechanical relays, each providing Normally Open (NO), Normally Closed (NC), and Common (COM)...
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The 2 Channel 5V Relay Module with Optocoupler Protection is a dual-channel switching module designed to control two AC or DC electrical loads independently using low-voltage signals from a microcontroller or digital control circuit. The module operates from a 5V DC supply and typically uses two SPDT electromechanical relays, each providing Normally Open (NO), Normally Closed (NC), and Common (COM) contacts.

The module features optocoupler isolation between the control inputs and relay-driving circuitry, helping improve noise immunity and protect the control side from electrical disturbances generated during relay switching. Common versions also include transistor relay drivers, flyback protection, relay status LEDs, screw terminals, and a VCC/JD-VCC jumper arrangement that can allow separate power supplies for the input and relay coil sections.

Each relay channel can typically switch loads up to 10A at 250VAC or 10A at 30VDC for resistive loads, subject to the ratings of the actual relay fitted to the board. The module is commonly used with Arduino, ESP32, STM32, Raspberry Pi, PIC, AVR, and other microcontrollers for home automation, lighting control, appliance switching, pump control, motor control, and industrial automation projects.

Key Features

  • Two independent relay switching channels
  • Operates from a 5V DC supply
  • Optocoupler-isolated control inputs
  • Two SPDT relay outputs
  • Separate NO, NC, and COM terminals for each channel
  • Typical switching capacity up to 10A
  • Supports both AC and DC load switching
  • Relay status indicator LED for each channel
  • Power status indication on common module versions
  • Transistor-based relay coil driving circuit
  • Flyback / back-EMF protection
  • Low-level triggering on common module versions
  • VCC and JD-VCC power separation support on compatible boards
  • Screw terminals for secure load connections
  • PCB mounting holes for easy installation
  • Compatible with many microcontroller platforms
  • Suitable for automation and IoT switching projects

Shipping & Returns

Orders placed before 3 PM IST will be shipped on the same day (excluding Sundays and Public holidays) through our shipping partners. In rare cases, the pickup may get delayed during Public holidays / Bandh / Environmental disturbances.

Specifications

Specifications:

Module Type: Dual-Channel Relay Interface Module
Number of Relay Channels: 2
Operating Voltage: 5V DC
Relay Type: Electromechanical SPDT Relay
Contact Configuration: SPDT (1 Form C) Per Channel
Number of Load Terminals: 6 Total
Control Inputs: IN1 and IN2
Trigger Type: Low-Level Trigger on Common Versions
Input Driver Current: Approximately 15–20mA Per Channel on Common Versions
Typical Relay Contact Rating: 10A at 250VAC
Typical DC Contact Rating: 10A at 30VDC
Output Contacts Per Channel: NO, NC and COM
Optical Isolation: Yes
Status Indicators: Individual Relay Status LEDs
Back-EMF Protection: Yes
Relay Coil Voltage: 5V DC
Control Method: Digital Logic Signal
Power Separation: VCC and JD-VCC on Supported Versions
Connection Type: Pin Header for Control and Screw Terminals for Loads
Typical Module Dimensions: Approximately 50.5mm × 38.5mm × 18.5mm
Typical Weight: Approximately 31g
Mounting Hole Diameter: Approximately 3.1mm
Compatibility: Arduino UNO, Nano, Mega, ESP32, STM32, Raspberry Pi, PIC, AVR, 8051, ARM and other compatible controllers.

Additional Resources

2 Channel 5V Relay.PDF

FAQ

1. What is the 2 Channel 5V Relay Module used for?

The module is used to independently switch two AC or DC electrical loads using low-voltage control signals. It is commonly used for controlling lights, fans, pumps, motors, solenoid valves, appliances, and other electrical devices.

2. What is the purpose of the optocoupler on the relay module?

The optocoupler transfers the control signal using light within the device, helping isolate the input control circuitry from electrical disturbances in the relay-driving section and improving noise immunity.

3. Can the 2 Channel Relay Module be used with Arduino and ESP32?

Yes. The module can be used with Arduino, ESP32, STM32, Raspberry Pi, PIC, AVR, and other controllers. Compatibility with 3.3V logic should be checked for the specific module version and wiring configuration.

4. Can both relay channels operate at the same time?

Yes. Both relay channels are independently controlled through IN1 and IN2, so either relay can operate separately or both can be activated simultaneously.

5. What is the difference between NO, NC, and COM terminals?

COM is the common switching terminal. NC is connected to COM when the relay is inactive, while NO connects to COM when the relay is activated. This allows the module to control loads that should normally remain ON or normally remain OFF.