Generic 2 Channel 5V Relay Module | Opto-Isolated | High Current Switching
₹149.00₹250.00 (price_including_tax) (-40%)
Effortlessly control high-voltage loads with your microcontroller projects. This module provides a robust, safe interface for automation and embedded systems. Engineered for stability and durability, ensuring long-term operational integrity.
Reliable, opto-isolated 2-channel 5V relay module for versatile microcontroller interfacing and power switching.
Opto-isolated inputs safeguard your valuable microcontroller, preventing damage from high voltage spikes.
Reliably switch up to 10A AC/DC loads, expanding project possibilities beyond low power.
Standard 5V logic and clearly labeled terminals ensure quick, error-free setup and operation.
The Engineering Behind 2 Channel 5V Relay Module
The 2 Channel 5V Relay Module serves as an essential interface for controlling higher power AC or DC loads using low-voltage microcontroller logic. It typically integrates two Songle SRD-05VDC-SL-C or similar 5V single-pole double-throw (SPDT) relays, driven by an NPN transistor (like a S8050) and equipped with opto-couplers (e.g., PC817) for robust electrical isolation. This architecture protects sensitive control circuitry from high-voltage transients and ground loop issues.
Constructed on a high-quality FR-4 PCB, this module features clearly marked screw terminals for load connections (NO, NC, COM) and standard header pins for control signals (VCC, GND, IN1, IN2). The design prioritizes safe and reliable operation, making it ideal for educational projects, home automation, and industrial control prototyping. Built-in flyback diodes protect the switching transistors from inductive load spikes, ensuring component longevity.
Opto-Isolation for Superior Circuit Protection
The integrated opto-isolator (photocoupler) circuitry provides critical galvanic isolation between the low-voltage control side (microcontroller) and the high-voltage load side. This prevents high-voltage spikes, noise, and ground potential differences from affecting the sensitive digital control electronics, significantly enhancing system stability and safety in industrial and power control applications.
Flexible 5V TTL/CMOS Logic Control
Designed to operate seamlessly with standard 5V TTL and CMOS logic levels, this module is directly compatible with Arduino, Raspberry Pi, ESP32, and other popular development platforms. The active-LOW trigger mechanism allows for straightforward integration, where a low signal (GND) activates the relay, simplifying code and minimizing external component requirements in many common scenarios.
Optimized for Performance & Integration
- Channels: 2 Independent Relay Channels
- Relay Type: SPDT (Single Pole Double Throw)
- Control Voltage: 5V DC (TTL/CMOS compatible)
- Max Load Current: 10A @ 250VAC / 10A @ 30VDC per channel
- Isolation: Opto-isolated Input
- Trigger Logic: Active LOW
- Mounting: Standard Mounting Holes
- Indicator LEDs: Power LED + 2 Channel Status LEDs
Features & Benefits
- Dual-Channel Control: Independently switch two separate high-power loads using a single module.
- 5V Logic Compatibility: Directly interface with popular microcontrollers like Arduino, Raspberry Pi, and ESP32.
- Opto-Isolated Inputs: Ensures robust electrical isolation, protecting sensitive control circuitry from load side interference.
- High Current Switching: Capable of handling loads up to 10A at 250VAC or 30VDC, ideal for various applications.
- Active LOW Trigger: Simplifies control logic by activating relays with a low signal from your microcontroller.
- Integrated Status LEDs: Provides visual feedback for power and individual relay channel status, aiding debugging.
Pro-Grade Advantages
- Galvanic isolation protects low-voltage control circuits from high-power side noise and transients.
- High current capacity per channel (10A) allows for versatile control of various appliances and motors.
- Compact design with standard mounting holes facilitates easy integration into custom enclosures and PCBs.
- Visual LED indicators provide immediate feedback on relay status, simplifying debugging and monitoring.
Technical Considerations
- Requires an external 5V power supply for reliable operation, especially when switching inductive loads.
- Active-LOW trigger might require inverter logic for some microcontrollers that default to active-HIGH.
What is the primary function of a 2 Channel 5V Relay Module?
The module’s primary function is to enable low-voltage microcontrollers (typically 5V logic) to control high-voltage or high-current AC/DC electrical loads, acting as an electronically controlled switch.
How does the opto-isolation feature protect my microcontroller?
Opto-isolation uses light to transmit signals between the control and load sides, creating a physical electrical barrier. This prevents electrical noise, voltage spikes, and ground loops from the high-power circuit from reaching and damaging your sensitive microcontroller.
What is the maximum current and voltage this relay module can switch?
Each channel of this module is typically rated to switch up to 10 Amperes at 250 Volts AC or 10 Amperes at 30 Volts DC. Always ensure your load’s specifications do not exceed these ratings.
Is this module compatible with both Arduino and Raspberry Pi?
Yes, the module is designed to be compatible with 5V TTL/CMOS logic, making it suitable for direct interfacing with most Arduino boards and Raspberry Pi’s GPIO pins (often with level shifting for Pi’s 3.3V logic to correctly trigger 5V relays, though active-LOW can sometimes simplify this).
What does ‘Active LOW’ trigger logic mean for this relay?
Active LOW means the relay coil will energize (and the relay will switch state) when the input signal pin (IN1 or IN2) is pulled to a LOW logical state (typically 0V or Ground) by your microcontroller. A HIGH logical state (5V) keeps the relay de-energized.
| Specification | Value |
|---|---|
| Number of Channels | 2 |
| Operating Voltage | 5V DC |
| Trigger Logic | Active LOW |
| Maximum Load Current (AC) | 10A @ 250VAC |
| Maximum Load Current (DC) | 10A @ 30VDC |
| Isolation Method | Opto-isolated |
| Control Signal Interface | VCC, GND, IN1, IN2 |
| Load Interface | Screw Terminals (NO, NC, COM) |
| Indicator LEDs | Power, Channel 1 Status, Channel 2 Status |
| Module Dimensions | Approx. 50mm x 40mm x 18mm |
Additional information
| Weight | 0.025 kg |
|---|---|
| Dimensions | 5 × 4 × 1.8 cm |
| Brand | Generic |
| Operating Voltage | 5V DC |
| Max Current | 10A (per channel) |
| Channels | 2 |
| Control Voltage | 5V DC |
| Load Capacity | 10A @ 250VAC / 10A @ 30VDC |
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