4-Channel 5V Relay Board
4-Channel 5V Relay Board
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Looking to buy 4-Channel 5V Relay Board at the best price in India? Tech Depot India 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.
Control up to four high-power devices independently using any 5V microcontroller with this optocoupler-isolated 4-channel relay module from Tech Depot India, Bengaluru.
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 |
Why Choose 4-Channel 5V Relay Board?
100% Authentic
GST Invoice - A GST invoice is included with every order.
Expert Support - Dedicated technical help on WhatsApp and email.
Pan-India Delivery - Shipped across Bengaluru, Delhi NCR, Hyderabad and all of India.
Trusted by Makers - Used by students, hobbyists and professionals nationwide.
Key Features of 4-Channel 5V Relay Board
- 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.
- 100% authentic from trusted component suppliers - no clones or remarked parts.
- Ideal balance of channel count, board size, and cost for most home-automation and IoT projects.
Perfect For
- 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
Is technical support available?
Yes, responsive support via email and WhatsApp for setup, troubleshooting, and application guidance.
Are bulk discounts available?
Yes, wholesale pricing on orders of 10+ units. Contact us via WhatsApp or email for a custom quote.
Customer Support
Email: techdepotindia@gmail.com
WhatsApp: Available for setup and troubleshooting help
Order your 4-Channel 5V Relay Board today and start building your next project.
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