Generic 5V 8 Channel Relay Module | High-Current Switching | Microcontroller Compatible
₹149.00₹250.00 (price_including_tax) (-40%)
Achieve precise and isolated control over multiple high-power electrical circuits. Effortlessly integrate this module into your Arduino or Raspberry Pi projects for home automation. Engineered with optically isolated inputs, it ensures robust, noise-free, and dependable switching performance.
Reliable 5V 8-channel relay module for robust control of AC/DC loads with precise microcontroller interfacing.
Effortlessly control high-power devices, protecting sensitive electronics from electrical interference and surges.
Directly connects to Arduino and Raspberry Pi, simplifying complex automation projects with ease.
Galvanic isolation secures your digital logic, ensuring dependable operation and preventing system damage.
The Engineering Behind 5V 8 Channel Relay Module
This 5V 8 Channel Relay Module provides an essential interface for microcontrollers to control high-voltage and high-current AC or DC loads. Each channel operates independently, featuring a robust Songle SRD-05VDC-SL-C relay, enabling the switching of devices up to 10A at 250VAC or 30VDC. The module integrates effective driver circuitry, typically based on a ULN2003 or similar Darlington array, to manage the coil current efficiently, ensuring reliable activation and deactivation of each relay without overloading the microcontroller’s output pins.
Designed for durability and safety, the module incorporates optocouplers (such as PC817) on each channel, providing galvanic isolation between the low-voltage control side (microcontroller) and the high-voltage load side. This critical isolation protects sensitive digital electronics from voltage spikes, noise, and ground loops originating from the power-switching circuits, making it ideal for industrial control, smart home automation, and advanced robotics applications where electrical safety and signal integrity are paramount.
Opto-Isolation for Enhanced Safety
The integrated opto-isolation circuitry fundamentally enhances system safety and reliability by creating an electrical barrier. This prevents stray currents or unexpected voltage fluctuations from the load side from propagating back to the sensitive microcontroller, safeguarding against damage and ensuring stable operation. It is particularly crucial in environments where inductive loads might generate back-EMF or where electrical noise could corrupt digital signals.
Flexible Input Control & Indicator LEDs
Each relay channel can be independently controlled via a simple high/low digital signal from the microcontroller, offering flexibility for various project requirements. Onboard LED indicators for each channel provide immediate visual feedback on the relay’s switching state, simplifying debugging and system monitoring. This eliminates the need for external diagnostic tools to confirm relay activation, streamlining development and troubleshooting processes for complex embedded systems.
Optimized for Performance & Integration
- Operating Voltage: 5V DC (Control Side)
- Number of Channels: 8 independent channels
- Load Capacity (per channel): 10A @ 250VAC / 30VDC
- Isolation: Opto-isolated inputs (PC817)
- Indicator LEDs: Yes, for each channel
- Trigger Logic: Low-level trigger (configurable)
- Interface: Standard pin headers for easy connection
- Relay Model: Songle SRD-05VDC-SL-C
Features & Benefits
- 8 Independent Channels: Provides simultaneous control over multiple diverse electrical loads or circuits.
- 5V DC Control Voltage: Directly compatible with common microcontrollers like Arduino, ESP32, and Raspberry Pi.
- High Current Switching Capability: Safely manages loads up to 10A at 250VAC or 30VDC for robust power control.
- Opto-Isolated Inputs: Ensures crucial electrical isolation between your control circuit and high-voltage power applications, enhancing safety.
- LED Status Indicators: Offers instant visual confirmation of each relay’s activation state, simplifying debugging.
- Low-Level Trigger: Activates relays with a low signal, making it versatile for various control logic designs.
Pro-Grade Advantages
- High channel count enables extensive multi-device control solutions.
- Crucial opto-isolation safeguards sensitive control electronics from high-voltage surges.
- Standard 5V logic compatibility simplifies integration with most microcontrollers.
- Clear LED status indicators provide immediate visual feedback for each channel.
Technical Considerations
- Can draw significant current from the 5V power supply when all relays are simultaneously active.
- Stable operation, particularly with all channels engaged, typically necessitates an external isolated 5V power source.
What is the primary function of this 5V 8 Channel Relay Module?
This module’s primary function is to enable low-power microcontrollers to safely switch on or off high-power electrical devices (AC or DC loads) that exceed the microcontroller’s direct current handling capacity, utilizing eight independent relay channels.
How does opto-isolation work and why is it important for this relay module?
Opto-isolation uses light (LEDs and phototransistors) to transfer a control signal across an electrical barrier without direct electrical contact. This is crucial for relay modules to prevent high-voltage spikes, noise, or ground loops from the load side from damaging the sensitive low-voltage control circuitry of a microcontroller.
What kind of loads can each channel of this relay module switch?
Each channel is rated to switch loads up to 10 Amperes at 250 Volts AC or 10 Amperes at 30 Volts DC. It is essential to stay within these specifications to ensure safe and reliable operation of the relays.
Is this relay module compatible with Arduino and Raspberry Pi?
Yes, this 5V relay module is fully compatible with 5V logic microcontrollers such as Arduino boards and can also be used with Raspberry Pi boards, requiring a logic level shifter if the Pi’s 3.3V GPIO is used directly without considering the trigger voltage.
What is ‘low-level trigger’ and how does it affect circuit design?
‘Low-level trigger’ means the relay activates when the control pin receives a LOW signal (0V or ground) from the microcontroller and deactivates when it receives a HIGH signal (5V). This is a common configuration that designers must account for in their control logic and code.
What kind of power supply is recommended for this 8-channel relay module?
While the control side can be powered by the microcontroller’s 5V output, for robust and stable operation, especially when multiple relays are active simultaneously, it is highly recommended to use an external, dedicated 5V power supply with sufficient current capacity (e.g., 1A or more) for the module.
| Specification | Value |
|---|---|
| Input Control Voltage | 5V DC |
| Number of Channels | 8 |
| Relay Type | SPDT (Single Pole Double Throw) |
| Maximum Load Voltage | 250V AC / 30V DC |
| Maximum Load Current | 10A (per channel) |
| Isolation Type | Opto-isolated (PC817) |
| Trigger Logic | Low-level trigger |
| Indicator LEDs | 8 x Channel Status, 1 x Power |
| Mounting Holes | Yes |
| Module Dimensions | Approx. 139mm x 53mm x 18.5mm |
| Relay Model | Songle SRD-05VDC-SL-C |
Additional information
| Weight | 0.12 kg |
|---|---|
| Dimensions | 13.9 × 5.3 × 1.85 cm |
| Brand | Generic |
| Technology | Electromechanical Relay with Opto-isolation |
| Operating Voltage | 5V DC |
| Max Current | 10A (per channel) |
| Channels | 8 |
| Control Voltage | 5V DC |
| Load Capacity | 10A @ 250VAC / 30VDC |
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