🔌 5V 8-Channel Relay Module — Arduino / ESP8266 / Raspberry Pi Compatible

An 8-channel relay module board with 5V active-low inputs for controlling up to eight high-power loads from a microcontroller. Each relay handles AC 250V / 10A or DC 30V / 10A — switch lights, pumps, motors, solenoid valves, fans, and other appliances directly from an Arduino, ESP8266, ESP32, Raspberry Pi, or any 5V-logic microcontroller. Individual red status LEDs per channel and optocoupler isolation for safe, reliable operation.

🚚

Free Delivery

Orders over R2,500

🇿🇦

Local Stock

Ships from Gauteng

⚡

10A per Channel

AC 250V / DC 30V

🔧

8 Channels

Independent relays

⚡ Key Features

8 Independent Relay Channels — each relay has its own NO (Normally Open), NC (Normally Closed), and COM (Common) screw terminals; switch eight loads independently
Active-Low Trigger (5V Logic) — pull the input pin LOW to activate the relay; compatible with Arduino (5V), ESP8266/ESP32 (3.3V — check logic levels), Raspberry Pi (with level shifter), PLC, and other microcontrollers
High-Power Switching — each relay rated for AC 250V / 10A and DC 30V / 10A; control mains-powered lights, pumps, heaters, fans, and solenoid valves
Optocoupler Isolation — relay coils are optically isolated from the control inputs; protects your microcontroller from back-EMF and electrical noise
Individual Status LEDs — red LED per channel lights up when the relay is activated; easy visual confirmation of which channels are on
Standard Pin Header Interface — plug directly into a breadboard or connect with jumper wires; IN1–IN8 control inputs, VCC (5V), GND
Mounting Holes — four corner mounting holes for secure installation in an enclosure or project box

⚠️ Mains Voltage Warning!
This module can switch 230V AC mains power. Working with mains voltage is dangerous and can be lethal. Only connect mains wiring if you are a qualified electrician or have experience working with high voltage. Always ensure power is OFF before wiring. Use an appropriate enclosure — never leave exposed mains terminals accessible.

🏠 Popular DIY Use Cases

🌱

8-Zone Irrigation

Control eight solenoid valves from an ESP8266 or Arduino running ESPHome or custom firmware. Schedule each zone independently via Home Assistant. Add a soil moisture sensor for automated watering.

💡

Multi-Room Lighting

Switch eight lighting circuits from a single board. Combine with a D1 Mini (ESP8266) running Tasmota or ESPHome for WiFi control of eight lights — all from your phone or Home Assistant.

🏠

Home Automation Hub

Build a custom smart home controller. Eight channels can control lights, fans, a pool pump, gate, garage, water valve, security floodlights, and a geyser — all from one Raspberry Pi or ESP32.

🔬

Lab / Workshop

Switch test equipment, soldering stations, extract fans, and bench lights. Use a PLC or Arduino for sequenced power-up routines. The optocoupler isolation protects sensitive equipment.

💡 DIY Smart Home Tip: Pair this 8-channel relay module with a D1 Mini (ESP8266) running ESPHome or Tasmota firmware. The D1 Mini provides WiFi connectivity and integrates directly with Home Assistant — giving you a custom 8-channel smart relay for a fraction of the cost of commercial alternatives. Wire the D1 Mini’s GPIO pins (D1–D8) to the relay module’s IN1–IN8 inputs.

📋 Technical Specifications

Channels	8 (independent)
Trigger Level	Active LOW (5V logic)
Control Voltage	5V DC (VCC input)
Relay Contact Rating	AC 250V / 10A — DC 30V / 10A
Relay Type	SPDT — NO (Normally Open) + NC (Normally Closed) + COM per channel
Isolation	Optocoupler (optical isolation between control and relay)
Status Indicators	Red LED per channel
Interface	Pin header (IN1–IN8, VCC, GND)
Compatible MCUs	Arduino, ESP8266, ESP32, Raspberry Pi, PIC, ARM, PLC
Mounting	4 × screw mounting holes
Operating Temp	-40°C to 85°C

❓ Frequently Asked Questions

Can I use it with a D1 Mini (ESP8266)?

Yes — the D1 Mini is one of the most popular controllers for this module. Flash the D1 Mini with ESPHome or Tasmota firmware, wire GPIO pins to IN1–IN8, and you have an 8-channel WiFi smart relay. Note: the D1 Mini uses 3.3V logic but the relay module’s optocouplers typically trigger at 3.3V without issues. If any channels are unreliable, use a logic level shifter or power the relay VCC from 5V and JD-VCC separately.

Does it work with Home Assistant?

Yes — when paired with an ESP8266/ESP32 running ESPHome, each relay channel appears as a switch entity in Home Assistant. Full local control, schedules, automations, and voice control via Alexa/Google.

Can I switch 230V AC mains with this?

Yes — each relay is rated for AC 250V / 10A. Wire the mains live wire through the relay’s COM and NO (or NC) terminals. Important: only do this if you are experienced with mains wiring. Use a proper enclosure, ensure adequate wire gauge, and follow South African electrical safety standards.

What does “active low” mean?

The relay activates when the input pin is pulled LOW (connected to ground). When the input is HIGH (or floating), the relay is off. In your Arduino/ESP code, set the output pin LOW to turn the relay on, and HIGH to turn it off. This is the opposite of what you might expect — but it’s standard for optocoupler-isolated relay modules.

Can I use it with a Raspberry Pi?

Yes — the Raspberry Pi’s GPIO pins output 3.3V, which is usually enough to trigger the optocouplers. If you experience issues, use a 5V-tolerant level shifter or drive the relays via a transistor. Power the relay module from the Pi’s 5V pin or an external 5V supply.

🤝 Need Help? We’re Here for You!

📞

Call Us

Jesse: 071 678 8719
Jason: 084 505 7481

🏢

Visit Us

8 Wildebraam Street
Weltevreden Park, Roodepoort
Gauteng, 1709

📧

Email

info@eiferer.co.za

8 Relays. 1 Board. Build Anything.

5V 8-Channel Relay Module · R149

Weight	109 kg
Title	Default Title

Reviews

There are no reviews yet.

Be the first to review “5V 8-Channel Relay Module”

5V 8-Channel Relay Module