1 / 2 / 4 / 6 / 8 Channel 12V 10A Relay Board Module - Image 1
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1 / 2 / 4 / 6 / 8 Channel 12V 10A Relay Board Module

1 / 2 / 4 / 6 / 8 Channel 5V 10A Relay Board Module for Arduino Raspberry Pi
1/2/4/6/8 Channel DC 5V Relay Module with Optocoupler – High/Low Level Trigger for Arduino
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Description

Enhance Your Control with our Multi-Channel 12V 10A Relay Board Modules!

Looking for top-notch relay solutions? Look no further! Our relay board modules offer unparalleled quality and versatility to empower your projects. Here’s why you need to consider them:

  1. Premium 12V Relays: Trust in the reliability of our high-quality 12V relays. Count on them to seamlessly manage your connections and operations.
  2. Visualize with Ease: With built-in relay status indicator LEDs, you can effortlessly monitor the status of each relay, ensuring efficient functionality at a glance.
  3. Streamlined Setup: Experience simplicity at its finest! Our relay board module features an intuitive 3-line structure, making setup a breeze even for newcomers.
  4. Power-Packed Performance: Ready to take on heavy-duty tasks! These modules can effortlessly control various high-current appliances and equipment, adding a new level of control to your projects.
  5. Universal Applicability: Whether you’re working with MCUs, delving into industrial sectors, engaging in PLC control, or managing smart homes, our relay board modules offer unparalleled versatility.

Technical Specifications:

  • Channels Available: 1 / 2 / 4 / 6 / 8
  • Direct Microcontroller Connection
  • LED Indicators for Visual Feedback
  • Switching Capacity: Up to 10A
  • Maximum Voltage Handling: 250VAC / 30VDC

Package Contents:

  • 1 x Relay Board Module

Please note that the relay brand might vary based on availability, but rest assured, we guarantee that all relays meet our stringent quality and specification standards.

Experience control, reliability, and efficiency like never before with our Multi-Channel 12V 10A Relay Board Modules. Elevate your projects today!

📌 Code Examples & Usage – 12 V Multi-Channel Relay Board (1 / 2 / 4 / 6 / 8 Channel)

📋 Overview

This 12 V relay board module allows low-voltage control signals from a microcontroller to safely switch high-power AC or DC loads.

Each relay is rated for up to 10 A, making the board suitable for:

  • Pumps and motors

  • Lighting circuits

  • Heaters

  • Power supplies

  • Industrial automation

  • Smart home switching

Available in 1, 2, 4, 6, and 8 channel variants.

⚠ IMPORTANT – Read Before Use

🚨 This board uses 12 V relay coils

  • Relays require an external 12 V power supply

  • Microcontroller CANNOT power the relay coils

  • Logic control is low-voltage (3.3 V or 5 V)

  • AC mains wiring must be done safely and by qualified persons

✔ Most boards include optocoupler isolation
✔ AC and DC loads are supported (within relay rating)

🔌 Power & Control Overview

Relay Coil Power

  • 12 V DC to relay board (VCC / GND or JD-VCC / GND)

  • Must be capable of supplying enough current for all relays

Control Signals

  • Each relay has an IN pin (IN1, IN2, …)

  • Controlled by Arduino / ESP32 GPIO

🔌 Typical Pin Layout

Control Side

Pin Function
IN1…INx Relay control inputs
GND Logic ground
VCC Logic supply (often 5 V, board dependent)

Relay Power Side

Pin Function
12V / JD-VCC Relay coil supply
GND Relay ground

📌 Some boards separate logic power and relay power using a jumper — this is normal.

🔌 Relay Output Terminals

Each relay provides COM / NO / NC:

Terminal Meaning
COM Common
NO Normally Open (OFF by default)
NC Normally Closed (ON by default)

Typical usage:

  • COM → power source

  • NO → load (turns ON when relay activates)

🧪 1️⃣ Arduino Example – Single Relay Control

const int relayPin = 7;

void setup() {
pinMode(relayPin, OUTPUT);
digitalWrite(relayPin, HIGH); // Relay OFF (common)
}

void loop() {
digitalWrite(relayPin, LOW); // Relay ON
delay(2000);

digitalWrite(relayPin, HIGH); // Relay OFF
delay(2000);
}

📌 Many relay boards are LOW-level triggered
(LOW = relay ON, HIGH = relay OFF)

🧪 2️⃣ Arduino Example – Multiple Relays

int relays[] = {2, 3, 4, 5};

void setup() {
for (int i = 0; i < 4; i++) {
pinMode(relays[i], OUTPUT);
digitalWrite(relays[i], HIGH); // All OFF
}
}

void loop() {
for (int i = 0; i < 4; i++) {
digitalWrite(relays[i], LOW); // ON
delay(500);
}

for (int i = 0; i < 4; i++) {
digitalWrite(relays[i], HIGH); // OFF
delay(500);
}
}

Works with 2, 4, 6, or 8 channel boards.

🧪 3️⃣ ESP32 Example

ESP32 outputs 3.3 V logic, which is compatible with most opto-isolated relay boards.

const int relayPin = 18;

void setup() {
pinMode(relayPin, OUTPUT);
digitalWrite(relayPin, HIGH);
}

void loop() {
digitalWrite(relayPin, LOW);
delay(1000);
digitalWrite(relayPin, HIGH);
delay(1000);
}

✔ No level shifter required
✔ Use external 12 V supply for relays

⚡ Power Sizing Guide (Important)

Approximate coil current:

  • ~70–90 mA per relay

Relays Minimum 12 V Supply
1 0.2 A
2 0.3 A
4 0.5 A
6 0.7 A
8 1.0 A

👉 Always add headroom.

🧠 Safety Notes (AC Loads)

⚠ Mains voltage is dangerous

  • Use proper enclosures

  • Secure screw terminals

  • Keep low-voltage wiring separate

  • Use strain relief

  • Comply with local electrical regulations

🧠 Tips & Best Practices

✔ Label relay channels clearly
✔ Use NO terminals for fail-safe OFF state
✔ Do not exceed 10 A per relay
✔ Use snubbers for inductive AC loads
✔ Avoid switching high-inrush loads without protection

Additional information

Weight 130 g
Dimensions 260 × 160 × 20 mm
# of Channels

1, 2, 4, 6, 8

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