---
product_id: 29927454
title: "5 pcs 4 Channel 12V Relay Module Shield Expansion Board For Arduino Optical Isolation"
brand: "topseller2013888"
price: "£32.98"
currency: GBP
in_stock: false
url: https://www.desertcart.co.uk/products/29927454-5-pcs-4-channel-12v-relay-module-shield-expansion-board
store_origin: GB
region: United Kingdom
---

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

**Brand:** topseller2013888
**Price:** £32.98
**Availability:** ❌ Out of Stock

## Quick Answers

- **What is this?** 5 pcs 4 Channel 12V Relay Module Shield Expansion Board For Arduino Optical Isolation by topseller2013888
- **How much does it cost?** £32.98 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/29927454-5-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: 
5 X 4 Channel 12V Relay Module

## Images

![5 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.co.uk/products/29927454-5-pcs-4-channel-12v-relay-module-shield-expansion-board](https://www.desertcart.co.uk/products/29927454-5-pcs-4-channel-12v-relay-module-shield-expansion-board)

---

*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-05-18*