4-Channel 5V Relay Board
4-Channel 5V Relay Board
4-Channel 5V Relay Board
Control up to four high-power devices independently using any 5V microcontroller with this optocoupler-isolated 4-channel relay module from The Tech Depot, Bengaluru. Fast shipping, 7-day warranty on manufacturing defects, and dedicated technical support.
Specifications
| Relay Channels | 4 (independently controlled) |
| Signal Voltage | 5V DC (active-low trigger) |
| Coil Voltage | 5V DC |
| Contact Rating | 10A @ 250V AC / 10A @ 30V DC per channel |
| Contact Type | SPDT (NO, NC, COM) per relay |
| Trigger Current | ~15-20 mA per channel |
| Isolation | Optocoupler isolated (input-relay separation) |
| Relay Type | SRD-05VDC-SL-C (or equivalent sugar-cube relay) |
| Indicator LEDs | 4 x per-channel status LEDs + 1 x power LED |
| Input Header | 6-pin (GND, IN1, IN2, IN3, IN4, VCC) |
| Board Dimensions | ~75 x 55 x 19 mm |
| Mounting | 4 x M3 mounting holes |
| Operating Temperature | 40 degreesC to +85 degreesC |
| Compatibility | Arduino, Raspberry Pi, ESP32, ESP8266, STM32, PIC, 8051, and other 5V-logic boards |
| Origin | Original / Authentic |
| Warranty | 7-day warranty on manufacturing defects |
| Support | Email & WhatsApp 24/7 |
Key Features
- 4 Independent Channels: Switch four separate AC or DC loads simultaneously from a single microcontroller.
- Optocoupler Isolation: Protects your microcontroller from high-voltage transients and relay coil back-EMF.
- High-Current Contacts: Each relay handles up to 10 A @ 250 V AC - suitable for lights, fans, pumps, solenoids, and more.
- SPDT Outputs: Both Normally Open (NO) and Normally Closed (NC) terminals give you flexible wiring options per channel.
- Active-Low Trigger: Drive inputs LOW to energize relays; compatible with most microcontroller GPIO pins.
- Per-Channel Status LEDs: Instantly see which relays are active without external test equipment.
- Flyback Diodes Onboard: Built-in freewheeling diodes across each relay coil suppress voltage spikes during switching.
- Standard 2.54 mm Header: Plug directly into breadboards or connect with standard Dupont jumper wires.
- Compact & Mountable: Four M3 corner holes for secure enclosure or panel mounting.
Why Choose This?
- 100% authentic from trusted component suppliers - no clones or remarked parts.
- 1-5 day shipping, 7-8 day delivery from our Bengaluru warehouse; same-day delivery within Bengaluru.
- Expert technical support included - wiring guidance, code samples, and troubleshooting help.
- Ideal balance of channel count, board size, and cost for most home-automation and IoT projects.
Project Ideas
- Home Automation: Control lights, fans, water heaters, and appliances from your phone via ESP32 + Blynk or Home Assistant.
- Smart Irrigation: Automate up to four solenoid valves based on soil-moisture sensor readings with Arduino.
- Industrial Sequencing: Drive motors, pumps, or conveyor segments in timed sequences using PLC-style logic on STM32.
- Aquarium / Terrarium Controller: Schedule heater, filter, air pump, and LED lighting cycles independently.
- Garage & Security: Trigger door openers, sirens, electromagnetic locks, and indicator lights from a Raspberry Pi dashboard.
- Learning & Education: Teach relay logic, optocoupler operation, and safe AC switching in electronics labs.
Typical Wiring Guide
- VCC -> 5 V supply (can share with Arduino 5 V pin for light loads; use a separate 5 V adapter for all 4 relays under load).
- GND -> Common ground with microcontroller and 5 V supply.
- IN1-IN4 -> Digital GPIO pins (set LOW to activate relay, HIGH to deactivate).
- COM / NO / NC -> Connect your AC/DC load between COM and NO (for normally-off
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 4-Channel 5V Relay Board Online in India
Purchase the 4-Channel 5V Relay Board online at The Tech Depot - 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 4-Channel 5V 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 4-Channel 5V Relay Board at the best price in India? The Tech Depot 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.