Generic SRD-05VDC-SL-C Relay Module | 1 Channel 5V Control | Optocoupler Isolation
₹149.00₹250.00 (price_including_tax) (-40%)
Safely control high-voltage devices with your microcontroller. This 1-channel 5V relay module provides galvanic isolation, transforming low-voltage signals into high-power switching. Engineered for robust performance, it guarantees dependable operation in various automation projects.
Reliable 1-channel 5V relay module with optocoupler isolation ensures safe, efficient power switching for demanding control applications.
Optocoupler technology isolates control from power, protecting delicate microcontroller circuitry reliably.
Seamlessly integrates with 5V microcontrollers like Arduino, enhancing project flexibility effectively.
Switches up to 10A, making it ideal for controlling various AC/DC appliances safely.
The Engineering Behind 1 Channel 5V Relay Module
The 1 Channel 5V Relay Module with Optocoupler is a fundamental component designed for interfacing low-voltage microcontroller control systems with higher voltage or current loads. At its core, it integrates a Songle SRD-05VDC-SL-C type relay, actuated by a 5V DC control signal. The critical inclusion of an optocoupler (photocoupler) serves to provide complete electrical isolation between the control circuit (e.g., Arduino, Raspberry Pi) and the high-power load circuit, thereby protecting sensitive microcontroller pins from voltage spikes or ground loop issues.
Constructed on a compact PCB, this module features robust terminal blocks for secure connections to both the control signal and the load. The presence of a status LED clearly indicates the relay’s ON/OFF state, aiding in rapid prototyping and debugging. Component selection emphasizes reliability, ensuring stable switching cycles and extended operational lifespan even in continuous use scenarios, making it suitable for educational projects and industrial applications alike.
Optocoupler Isolation Protocol
The integrated optocoupler creates a critical barrier, optically transmitting the control signal while maintaining electrical separation. This galvanic isolation prevents noise propagation, common mode interference, and protects the low-voltage control circuitry from potentially damaging high-voltage transients or inductive kickback generated by the switched load, significantly enhancing system stability and safety.
Versatile 5V TTL/CMOS Compatibility
Designed for seamless integration, the module accepts standard 5V logic signals, making it directly compatible with popular development platforms like Arduino, Raspberry Pi, ESP32, and other 5V TTL/CMOS microcontrollers. This universal compatibility simplifies circuit design and reduces the need for additional level-shifting components, streamlining the development process for diverse automation tasks.
Optimized for Performance & Integration
- Channels: 1
- Control Voltage: 5V DC (TTL/CMOS compatible)
- Max Load (AC): 250V AC @ 10A
- Max Load (DC): 30V DC @ 10A
- Isolation: Optocoupler (galvanic isolation)
- Indicator: Status LED for relay state
- Terminals: Screw terminal blocks
Features & Benefits
- Single-Channel Control: Precisely manage one independent high-power circuit efficiently.
- 5V Logic Compatible: Direct interface with popular microcontrollers like Arduino and Raspberry Pi.
- Integrated Optocoupler: Provides essential galvanic isolation, protecting sensitive control electronics from load-side hazards.
- High-Current Switching: Capable of switching up to 10A at 250VAC or 30VDC, suitable for diverse applications.
- Status Indicator LED: Visual feedback confirms relay state, simplifying debugging and operation monitoring.
- Screw Terminal Connectivity: Ensures secure and reliable wiring connections for both control and load.
Pro-Grade Advantages
- Galvanic isolation protects microcontrollers from high-voltage spikes.
- Compatible with a wide range of 5V logic microcontrollers.
- High current switching capacity suitable for many home appliances.
- Compact form factor for easy integration into project enclosures.
Technical Considerations
- Limited to single-channel operation, requiring multiple modules for complex control.
- Inductive loads may require additional flyback diode protection if not internal.
What is the primary function of the optocoupler in this relay module?
The optocoupler provides galvanic isolation, electrically separating the low-voltage control circuit from the high-voltage load circuit, thereby protecting sensitive microcontroller pins from damage due to voltage spikes or ground loops.
Can this relay module switch both AC and DC loads?
Yes, this relay module is designed to switch both AC loads (up to 250V AC at 10A) and DC loads (up to 30V DC at 10A), offering versatile application capabilities.
What control voltage is required for this 1-channel relay module?
This specific module requires a 5V DC logic signal for its control input, making it directly compatible with 5V TTL/CMOS microcontrollers.
How do I connect inductive loads to this module?
For inductive loads (like motors or solenoids), it is best practice to include an external flyback diode in parallel with the load to dissipate back-EMF, protecting the relay contacts and extending their lifespan.
Is this module suitable for industrial applications?
While robust for many DIY and educational projects, for critical industrial applications, consider industrial-grade relays with higher ratings, certifications, and advanced protection features for enhanced reliability and safety.
| Specification | Value |
|---|---|
| Control Interface | Logic HIGH/LOW |
| Trigger Current | ~5mA (Logic Input) |
| Relay Model | Songle SRD-05VDC-SL-C |
| Isolation Type | Optical (PC817 Optocoupler or equivalent) |
| Indicator | Power LED, Status LED |
| Mounting Holes | Yes |
| Switching Cycles | 100,000+ |
Additional information
| Brand | Generic |
|---|---|
| Technology | Electromechanical Relay with Optocoupler |
| Operating Voltage | 5V DC |
| Max Current | 10A |
| Control Voltage | 5V DC |
| Load Capacity | 250V AC @ 10A / 30V DC @ 10A |
| Channels | 1 |
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