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1CH 5V Optocoupler Relay Board
Control high-voltage appliances safely from your microcontroller with this 1-Channel 5V Optocoupler Relay Board. The built-in optocoupler provides complete electrical isolation between your low-voltage control circuit (Arduino, Raspberry Pi, ESP32) and the high-voltage load side, protecting your sensitive electronics from voltage spikes and back-EMF. Ideal for home automation, IoT switching, and industrial control projects. Available at The Engineer Store, Bengaluru with fast shipping and full technical support.
Specifications
| Channels | 1 Channel |
| Control Voltage | 5V DC (TTL Logic Compatible) |
| Trigger Type | Active Low (Low-level trigger) |
| Isolation | Optocoupler isolated (input-output electrical separation) |
| Relay Type | SPDT (Single Pole Double Throw) - NO, NC, COM terminals |
| Relay Rated Load | 10A @ 250V AC / 10A @ 30V DC (maximum) |
| Coil Voltage | 5V DC |
| Input Signal Current | ~15-20 mA |
| Switching Time | ~10 ms (typical) |
| Relay Mechanical Life | ~100,000 operations |
| Indicator LEDs | Power LED + Relay Status LED |
| Board Dimensions | ~50 x 26 x 18.5 mm (approx.) |
| Mounting | Screw holes for secure panel/chassis mounting |
| Connector - Input | 3-pin header (VCC, GND, IN) |
| Connector - Output | Screw terminal block (NO, COM, NC) |
| Compatible Platforms | Arduino, Raspberry Pi, ESP8266, ESP32, STM32, PIC, 8051, NodeMCU |
| Operating Temperature | -25 degreesC to +70 degreesC |
| Type | Relay & Switching Module |
| Origin | Original/Authentic |
| Warranty | 7-day warranty on manufacturing defects |
| Support | Email & WhatsApp 24/7 |
Key Features
- Optocoupler Isolation: Completely separates the microcontroller side from the relay coil and high-voltage load, preventing ground loops, noise, and dangerous voltage feedback
- Active Low Trigger: Relay activates when the input signal is pulled LOW, compatible with most microcontroller GPIO pins and open-collector outputs
- High-Current Switching: Handles loads up to 10A at 250V AC or 30V DC - enough for lights, fans, motors, pumps, solenoid valves, and heaters
- SPDT Relay Output: Three-terminal screw block (NO, NC, COM) allows both normally-open and normally-closed configurations for flexible circuit design
- Dual Status LEDs: Onboard power indicator and relay activation LED provide instant visual confirmation of board status and switching state
- Screw Terminal Output: Secure, vibration-resistant connections for high-voltage wiring - no soldering needed on the load side
- Standard Pin Header Input: 3-pin header (VCC, GND, IN) for quick breadboard prototyping or direct jumper wire connection
- Compact Single-Channel Design: Small footprint perfect for projects requiring just one switching channel without wasting board space
- Mounting Holes: Pre-drilled holes for secure screw mounting inside enclosures, control panels, or DIN rail setups
- Wide Platform Compatibility: Works seamlessly with Arduino Uno/Mega/Nano, Raspberry Pi, ESP8266, ESP32, NodeMCU, STM32, and virtually any 5V logic microcontroller
Why Choose This?
- 100% authentic from trusted suppliers - quality-tested relay and optocoupler components
- 1-5 day shipping, 7-8 day delivery from Bengaluru warehouse across India
- Expert technical support included for wiring, code, and integration help
- Optocoupler isolation adds a critical safety layer absent in basic relay modules
- Battle-tested design used in thousands of home automation and IoT projects worldwide
How It Works
- Input Side: Connect VCC to 5V, GND to ground, and IN to a digital GPIO pin on your microcontroller
- Optocoupler Stage: When IN goes LOW, current flows through the optocoupler LED, which triggers the phototransistor on the isolated side - no electrical connection crosses the barrier
- Relay Activation: The phototransistor output drives a transistor that energizes the relay coil, mechanically
Frequently Asked Questions
When will I receive my order?
Products ship within 1-5 days from our Bengaluru warehouse. Delivery within 7-8 days to most locations across India.
Is technical support available?
Yes, 24/7 support via email and WhatsApp for setup, troubleshooting, and application guidance.
What is your return policy?
7-day returns on manufacturing defects only. Full refund or replacement. Not applicable for user damage or misuse.
Are bulk discounts available?
Yes, wholesale pricing on orders of 10+ units. Contact us via WhatsApp or email for a custom quote.
Buy 1CH 5v Optocoupler Relay Board Online in India
Purchase the 1CH 5v Optocoupler Relay Board online at The Engineer Store - India's most trusted electronics components store. We deliver across all major cities including Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on 1CH 5v Optocoupler Relay Board with fast 1-5 day shipping from our Bengaluru warehouse. All products are 100% authentic, sourced from authorized distributors with 7-day warranty on manufacturing defects.
Looking to buy 1CH 5v Optocoupler Relay Board at the best price in India? The Engineer Store offers competitive pricing, bulk discounts for orders of 10+ units, and dedicated technical support via email and WhatsApp. Whether you are a hobbyist, student, or professional engineer, we have everything you need for your electronics projects.
1CH 5V Optocoupler Relay Board
Control high-voltage appliances safely from your microcontroller with this 1-Channel 5V Optocoupler Relay Board. The built-in optocoupler provides complete electrical isolation between your low-voltage control circuit (Arduino, Raspberry Pi, ESP32) and the high-voltage load side, protecting your sensitive electronics from voltage spikes and back-EMF. Ideal for home automation, IoT switching, and industrial control projects. Available at The Engineer Store, Bengaluru with fast shipping and full technical support.
Specifications
| Channels | 1 Channel |
| Control Voltage | 5V DC (TTL Logic Compatible) |
| Trigger Type | Active Low (Low-level trigger) |
| Isolation | Optocoupler isolated (input-output electrical separation) |
| Relay Type | SPDT (Single Pole Double Throw) - NO, NC, COM terminals |
| Relay Rated Load | 10A @ 250V AC / 10A @ 30V DC (maximum) |
| Coil Voltage | 5V DC |
| Input Signal Current | ~15-20 mA |
| Switching Time | ~10 ms (typical) |
| Relay Mechanical Life | ~100,000 operations |
| Indicator LEDs | Power LED + Relay Status LED |
| Board Dimensions | ~50 x 26 x 18.5 mm (approx.) |
| Mounting | Screw holes for secure panel/chassis mounting |
| Connector - Input | 3-pin header (VCC, GND, IN) |
| Connector - Output | Screw terminal block (NO, COM, NC) |
| Compatible Platforms | Arduino, Raspberry Pi, ESP8266, ESP32, STM32, PIC, 8051, NodeMCU |
| Operating Temperature | -25 degreesC to +70 degreesC |
| Type | Relay & Switching Module |
| Origin | Original/Authentic |
| Warranty | 7-day warranty on manufacturing defects |
| Support | Email & WhatsApp 24/7 |
Key Features
- Optocoupler Isolation: Completely separates the microcontroller side from the relay coil and high-voltage load, preventing ground loops, noise, and dangerous voltage feedback
- Active Low Trigger: Relay activates when the input signal is pulled LOW, compatible with most microcontroller GPIO pins and open-collector outputs
- High-Current Switching: Handles loads up to 10A at 250V AC or 30V DC - enough for lights, fans, motors, pumps, solenoid valves, and heaters
- SPDT Relay Output: Three-terminal screw block (NO, NC, COM) allows both normally-open and normally-closed configurations for flexible circuit design
- Dual Status LEDs: Onboard power indicator and relay activation LED provide instant visual confirmation of board status and switching state
- Screw Terminal Output: Secure, vibration-resistant connections for high-voltage wiring - no soldering needed on the load side
- Standard Pin Header Input: 3-pin header (VCC, GND, IN) for quick breadboard prototyping or direct jumper wire connection
- Compact Single-Channel Design: Small footprint perfect for projects requiring just one switching channel without wasting board space
- Mounting Holes: Pre-drilled holes for secure screw mounting inside enclosures, control panels, or DIN rail setups
- Wide Platform Compatibility: Works seamlessly with Arduino Uno/Mega/Nano, Raspberry Pi, ESP8266, ESP32, NodeMCU, STM32, and virtually any 5V logic microcontroller
Why Choose This?
- 100% authentic from trusted suppliers - quality-tested relay and optocoupler components
- 1-5 day shipping, 7-8 day delivery from Bengaluru warehouse across India
- Expert technical support included for wiring, code, and integration help
- Optocoupler isolation adds a critical safety layer absent in basic relay modules
- Battle-tested design used in thousands of home automation and IoT projects worldwide
How It Works
- Input Side: Connect VCC to 5V, GND to ground, and IN to a digital GPIO pin on your microcontroller
- Optocoupler Stage: When IN goes LOW, current flows through the optocoupler LED, which triggers the phototransistor on the isolated side - no electrical connection crosses the barrier
- Relay Activation: The phototransistor output drives a transistor that energizes the relay coil, mechanically
Frequently Asked Questions
When will I receive my order?
Products ship within 1-5 days from our Bengaluru warehouse. Delivery within 7-8 days to most locations across India.
Is technical support available?
Yes, 24/7 support via email and WhatsApp for setup, troubleshooting, and application guidance.
What is your return policy?
7-day returns on manufacturing defects only. Full refund or replacement. Not applicable for user damage or misuse.
Are bulk discounts available?
Yes, wholesale pricing on orders of 10+ units. Contact us via WhatsApp or email for a custom quote.
Buy 1CH 5v Optocoupler Relay Board Online in India
Purchase the 1CH 5v Optocoupler Relay Board online at The Engineer Store - India's most trusted electronics components store. We deliver across all major cities including Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on 1CH 5v Optocoupler Relay Board with fast 1-5 day shipping from our Bengaluru warehouse. All products are 100% authentic, sourced from authorized distributors with 7-day warranty on manufacturing defects.
Looking to buy 1CH 5v Optocoupler Relay Board at the best price in India? The Engineer Store offers competitive pricing, bulk discounts for orders of 10+ units, and dedicated technical support via email and WhatsApp. Whether you are a hobbyist, student, or professional engineer, we have everything you need for your electronics projects.