---
product_id: 332289502
title: "4pcs DC 12V Relay Module 1 Channel Relay Board with Optocoupler Isolation Support High or Low Level"
brand: "aediko"
price: "£8.72"
currency: GBP
in_stock: true
reviews_count: 8
category: "Aediko"
url: https://www.desertcart.co.uk/products/332289502-4pcs-dc-12v-relay-module-1-channel-relay-board-optocoupler
store_origin: GB
region: United Kingdom
---

# 12V DC Coil Voltage 10A Max Load Capacity Optocoupler Isolation 4pcs DC 12V Relay Module 1 Channel Relay Board with Optocoupler Isolation Support High or Low Level

**Brand:** aediko
**Price:** £8.72
**Availability:** ✅ In Stock

## Summary

> ⚡ Elevate your automation game with fail-safe, high-power relay control!

## Quick Answers

- **What is this?** 4pcs DC 12V Relay Module 1 Channel Relay Board with Optocoupler Isolation Support High or Low Level by aediko
- **How much does it cost?** £8.72 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/332289502-4pcs-dc-12v-relay-module-1-channel-relay-board-optocoupler)

## Best For

- aediko enthusiasts

## Why This Product

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

## Key Features

- • **Fault-Tolerant Design:** Ensures relay stays inactive even if control line breaks—built for fail-safe performance.
- • **Robust 10A Load Handling:** Supports up to 250V AC or 30V DC at 10 amps, perfect for demanding industrial and DIY projects.
- • **Powerful 12V DC Operation:** Reliable voltage for seamless integration with ARM, PIC, AVR, Raspberry Pi, and CNC systems.
- • **Flexible High/Low Level Triggering:** Easily configurable jumper lets you switch relay activation mode to suit your control logic.
- • **Optocoupler Isolation for Stability:** Protects your microcontroller’s I/O ports from voltage spikes and interference.

## Overview

The AEDIKO 4pcs DC 12V Relay Module features a single-channel relay board with optocoupler isolation, supporting high or low-level triggering. It handles up to 10A at 250V AC or 30V DC, includes a fault-tolerant design to prevent accidental activation, and offers screw terminal connections for easy wiring. Ideal for professional-grade projects involving ARM, PIC, AVR, Raspberry Pi, CNC machines, and more.

## Description

Product description Specifications Channel: 1 Channel Working Voltage: DC 12V Action Time (Under Rated Voltage): Less Than 10ms Release Time (Under Rated Voltage): Less Than 5ms Normally Opened Compatible Load: 10A 250VAC / 15A 125VAC / 10A 30VDC Output Interface Normally Opened (NO) : Normally Open Pin of Relay. NO Pin is Not Connect to COM Pin When Relay Off. NO Pin is Connect to COM Pin When Relay On Common Pin (COM) : Common Pin of the Relay Normally Closed (NC) : Normally Close Pin of Relay. NC Pin is Connect to COM Pin When Relay Off. NC Pin is Not Connect to COM Pin When Relay On Input Interface DC+: Connect to Power Positive (According to the Relay Voltage Range) DC-: Connect to Power Negative IN: Relay Module Trigger Pin (High or Low Level Trigger Optional) High or Low Level Trigger Select 1. Use High Level Trigger When ¡°IN¡± input High Level Signal, the ¡°NO¡± connect with ¡±COM¡± When ¡°IN¡± input Low Level Signal, the ¡°NC¡± connect with ¡°COM¡± 2. Use Low Level Trigger When ¡°IN¡± input Low Level Signal, the ¡°NO¡± connect with ¡±COM¡± When ¡°IN¡± input High Level Signal, the ¡°NC Features Trigger Current: 2 - 5mA Trigger Voltage(LOW): 0 - 4V Trigger Voltage(HIGH): 4.5 - 12V Insulation Resistance: 100MΩ (500VDC) Power Indicator (Green), Relay Status Indicator (Red) User Friendly Interface Design. All Interfaces Can Be Connected Via Terminal Wiring Leads Directly Package Contents 4x 1 Channel 12V Relay Module with Optocoupler Support High/Low Level Trigger

Review: Great quality - I bought these to use for my CNC plasma table and it works great with no issues would definitely buy again if I needed to
Review: Works as intended and value for money - Product works as expected . I have to used it to control solenoid using float value for aquarium. Connect the 12v DC power directly to +/- terminals of relay.. Connect one float wire to signal interface and other wire to positive terminal. Now you can use this relay to make it NC/NO based on your requirement

## Features

- 12V Relay Module: Working Voltage: DC 12V; Maximum Load: AC 250V/10A, DC 30V/10A; Trigger Current of Opto-Isolator: 5mA
- Fault-Tolerant Design: Fault Tolerant Design, Even if the Control Line is Broken, the Relay will not Operate;All Interfaces of Relay can be Wired Out Through the Terminals Directly,Normally Open and Normally Closed
- Optocoupler Isolation:1 Channel Relay Board use Optocoupler Isolation that has Strong Driving Ability and Stable Performance ,The Isolation Circuit Prevent Damages to I / O Port by Relay Switch Current
- Jumper Design: The Relay Module has a Jumper That You Can Set Rather the Unit State Changes with High or Low Signal. Has Screw Terminals for Relay (NC,C,NO) and for Input; Coil +, Coil - and Trigger.
- Wide Application: DC 12V Relay Module Works Well with ARM /PIC /AVR /MCU/Raspberry/CNC Machine/ PS4 etc.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B095YFJ69T |
| Best Sellers Rank | #3,626 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Solid State Relays |
| Brand | AEDIKO |
| Brand Name | AEDIKO |
| Coil Voltage | 12 Volts (DC) |
| Connector Type | Through Hole |
| Contact Current Rating | 10 Amps |
| Contact Material | Silver |
| Contact Type | Normally Closed, Normally Open |
| Current Rating | 5 Milliamps |
| Customer Reviews | 4.6 out of 5 stars 235 Reviews |
| Manufacturer | AEDIKO |
| Maximum Switching Current | 10 Amps |
| Maximum Switching Voltage | 250 Volts |
| Minimum Switching Voltage | 250 Volts |
| Model | 14921 |
| Mounting Type | Screw Mount |
| Operation Mode | Automatic |
| Part Number | 14921 |
| Specification Met | Ma |
| UPC | 701715480605 |
| Unit Count | 4.0 Count |
| Wattage | 60 Milliwatts |

## Product Details

- **Connector Type:** Through Hole
- **Contact Material:** Silver
- **Contact Type:** Normally Closed, Normally Open
- **Current Rating:** 5 Milliamps
- **Mounting Type:** Screw Mount

## Images

![4pcs DC 12V Relay Module 1 Channel Relay Board with Optocoupler Isolation Support High or Low Level - Image 1](https://m.media-amazon.com/images/I/71TfqCqH8PL.jpg)
![4pcs DC 12V Relay Module 1 Channel Relay Board with Optocoupler Isolation Support High or Low Level - Image 2](https://m.media-amazon.com/images/I/71XwlT8dyHL.jpg)
![4pcs DC 12V Relay Module 1 Channel Relay Board with Optocoupler Isolation Support High or Low Level - Image 3](https://m.media-amazon.com/images/I/71dfUGPTyXL.jpg)
![4pcs DC 12V Relay Module 1 Channel Relay Board with Optocoupler Isolation Support High or Low Level - Image 4](https://m.media-amazon.com/images/I/71-hlQsXmCL.jpg)
![4pcs DC 12V Relay Module 1 Channel Relay Board with Optocoupler Isolation Support High or Low Level - Image 5](https://m.media-amazon.com/images/I/61P5QU6A+jL.jpg)

## Available Options

This product comes in different **Color** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great quality
*by M***S on February 8, 2026*

I bought these to use for my CNC plasma table and it works great with no issues would definitely buy again if I needed to

### ⭐⭐⭐⭐⭐ Works as intended and value for money
*by N***L on November 11, 2025*

Product works as expected . I have to used it to control solenoid using float value for aquarium. Connect the 12v DC power directly to +/- terminals of relay.. Connect one float wire to signal interface and other wire to positive terminal. Now you can use this relay to make it NC/NO based on your requirement

### ⭐⭐⭐⭐⭐ 3.3 volt trigger. Nice and easy!
*by J***Y on May 11, 2026*

These work perfectly fine with a 3.3 volt trigger. No problem at all.

## Frequently Bought Together

- AEDIKO 4pcs DC 12V Relay Module 1 Channel Relay Board with Optocoupler Isolation Support High or Low Level
- ELEGOO 120pcs Multicolored Dupont Wire 40pin Male to Female, 40pin Male to Male, 40pin Female to Female Breadboard Jumper Ribbon Cables Kit Compatible with Arduino Projects
- ELEGOO UNO R3 Board ATmega328P with USB Cable(Arduino-Compatible) for Arduino

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.co.uk/products/332289502-4pcs-dc-12v-relay-module-1-channel-relay-board-optocoupler](https://www.desertcart.co.uk/products/332289502-4pcs-dc-12v-relay-module-1-channel-relay-board-optocoupler)

---

*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-06-05*