---
product_id: 29927453
title: "2 pcs 4 Channel 12V Relay Module Shield Expansion Board For Arduino Optical Isolation"
brand: "topseller2013888"
price: "RM121"
currency: MYR
in_stock: true
url: https://www.desertcart.com.my/products/29927453-2-pcs-4-channel-12v-relay-module-shield-expansion-board
store_origin: MY
region: Malaysia
---

# 2 pcs 4 Channel 12V Relay Module Shield Expansion Board For Arduino Optical Isolation

**Brand:** topseller2013888
**Price:** RM121
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** 2 pcs 4 Channel 12V Relay Module Shield Expansion Board For Arduino Optical Isolation by topseller2013888
- **How much does it cost?** RM121 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.my](https://www.desertcart.com.my/products/29927453-2-pcs-4-channel-12v-relay-module-shield-expansion-board)

## Best For

- topseller2013888 enthusiasts

## Why This Product

- Trusted topseller2013888 brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Description

Product Features:
4 channel relay module, with Optical Isolation, high level absorption.
PCB backside has solder mask window, users can add tin to increase control current.
With LED indicator.
Pin instruction:
1. VCC-12V power.
2. GND
3. IN1-control terminals 1, high level relay absorption, low level relay release. Drive current should be more than 4 mA.
4. IN2-control terminals 2, high level relay absorption, low level relay release.
5. IN3-control terminals 3, high level relay absorption, low level relay release.
6. IN4-control terminals 4, high level relay absorption, low level relay release.
7. COM-control circuit ground. short circuit with GND .
8. GND
Package includes: 
2 X 4 Channel 12V Relay Module

## Images

![2 pcs 4 Channel 12V Relay Module Shield Expansion Board For Arduino Optical Isolation - Image 1](http://ecx.images-amazon.com/images/I/41F2mjBD8sL.jpg)

---

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**Shop now:** [https://www.desertcart.com.my/products/29927453-2-pcs-4-channel-12v-relay-module-shield-expansion-board](https://www.desertcart.com.my/products/29927453-2-pcs-4-channel-12v-relay-module-shield-expansion-board)

---

*Product available on Desertcart Malaysia*
*Store origin: MY*
*Last updated: 2026-01-31*