---
product_id: 1967420
title: "SainSmart 8-Channel Relay Module"
brand: "sainsmart"
price: "₩40505"
currency: KRW
in_stock: true
reviews_count: 11
category: "Sain Smart"
url: https://www.desertcart.kr/products/1967420-sainsmart-8-channel-relay-module
store_origin: KR
region: South Korea
---

# 10A high-current relay rating LED indicators for real-time relay status 5V coil voltage for microcontroller compatibility SainSmart 8-Channel Relay Module

**Brand:** sainsmart
**Price:** ₩40505
**Availability:** ✅ In Stock

## Summary

> 🔌 Command your smart projects with power and precision!

## Quick Answers

- **What is this?** SainSmart 8-Channel Relay Module by sainsmart
- **How much does it cost?** ₩40505 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/1967420-sainsmart-8-channel-relay-module)

## Best For

- sainsmart enthusiasts

## Why This Product

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

## Key Features

- • **Safe & Reliable:** Opto-isolation and diode protection safeguard your microcontroller from voltage spikes.
- • **Powerhouse Control:** Handle up to 10A per channel—perfect for heavy-duty appliances and projects.
- • **Instant Visual Feedback:** Built-in LEDs keep you in the loop with relay activation status—no guesswork needed.
- • **Plug & Play Versatility:** Standard interface with 8 channels and mounting holes for easy setup and expansion.
- • **Microcontroller Friendly:** Seamlessly integrates with Arduino, Raspberry Pi, ARM, and more at 5V logic levels.

## Overview

The SainSmart 8-Channel Relay Module is a robust 5V interface board designed to control high-current devices up to 10A per channel. Compatible with a wide range of microcontrollers including Arduino and ARM, it features LED indicators for real-time status, opto-isolation for input protection, and a user-friendly design with mounting options. Ideal for professionals and makers looking to effortlessly automate and manage multiple electrical loads with confidence.

## Description

This is a 5V 8-Channel Relay interface board Be able to control various appliances and other equipments with large current It can be controlled directly by Microcontroller(Arduino 8051 AVR PIC DSP ARM ARM MSP430 TTL logic)

Review: Easy to hook up, didn't blow up my Arduino! - Experience: Software engineer, learning electronics with my Arduino. My dad is an EE talked me through all current measurements. SETUP: - Connect arduino powersupply 5v to VCC - Connect arduino Digital ground to ground - Connect arduino digital output to any IN1-IN8 - You're in business! CURRENT: I connected my meter in series and found I was drawing 64mA across the Arduino 5v power supply and 1.9mA across the Arduino output pin. I flipped it over and measured 7100ohms across the coil, meaning the coil is drawing 0.7mA at 5v. These numbers honestly seem a little low to me - e.g. I expected more like 19mA across the output, but 64mA across the power supply seems very reasonable with all eight relays drawing 400mA per the spec. Note: Arduino max power supply voltage is 500mA on USB, so you're good there too. PROS: - This won't blow up your Arduino. - I didn't realize this model had LEDs. I looked at the 4 relay model and the LEDs are bigger, but these are smaller and work great. - LED's in the circuit act as diodes. My dad told me when the field collapses on a DC coil it generates a negative voltage. If you don't have a diode in the way you could burn up your output transistor. - This has NC (Normal Closed) and NO (Normal Open) contacts on the high voltage side. So if you want your lights ON or OFF by default you can do that. It has a nice diagram on the board showing how the high voltage contacts are laid out. - Price - 4 mounting holes on the board if you need to bolt it to something! - Lot's of fun - you should buy one! CONS: - N/A OTHER: - The header PINs are really nice, but I only have male breadboard jumpers and need to buy some male-female jumpers from radio shack before I can hook this baby up to my xMas light setup!!
Review: Opto-isolation, indicators, 3.3/5V and breadboard-friendly. Good price, but be careful tightening terminals. - These are wonderful and a great value. These have both optical and magnetic isolation, providing a lot of protection to the inputs from electrical faults on the outputs. They work well with 3.3V and 5V logic (RasPi, Teensy, Arduino, ...), requiring little current drive. Very breadboard-friendly if you use a simple M/F jumper wire. They have indicator LEDs that can save you hours of problem-determination time, aid classroom demonstrations and reassure you things are working as expected. They're red, so someone might confuse them with error LEDs. The contacts have fairly low bounce and quick switch-over time. They have 3 terminals per SPDT relay, but they are soldered to the board, not on a connector. This is the only drawback I can find with this product. If you twist too hard, you can ruin the terminal. Fortunately it's a common header and easy to resolder.

## Features

- 5V 8-Channel Relay interface board, and each one needs 15-20mA Driver Current
- Equipped with high-current relay, AC250V 10A ; DC30V 11A
- Standard interface that can be controlled directly by microcontroller (Arduino , 8051, AVR, PIC, DSP, ARM, ARM, MSP432, TTL logic)
- Indication LED's for Relay output status

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0057OC5WK |
| Best Sellers Rank | #295,767 in Automotive ( See Top 100 in Automotive ) #82 in Automotive Replacement Relay Control Module Relays |
| Brand | SainSmart |
| Coil Voltage | 5 Volts |
| Color | Blue |
| Connector Type | Through Hole |
| Contact Current Rating | 10 Amps |
| Contact Type | Normally Open |
| Current Rating | 20 Milliamps |
| Customer Reviews | 4.5 4.5 out of 5 stars (424) |
| Date First Available | June 23, 2011 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 4.2 ounces |
| Item model number | 101-70-102 |
| Manufacturer | SainStore Inc. |
| Maximum Switching Current | 10 Amps |
| Maximum Switching Voltage | 30 Volts |
| Minimum Switching Voltage | 5 Volts |
| Mounting Type | DIN Rail Mount |
| Operation Mode | Manual |
| Other display features | Wireless |
| Product Dimensions | 7 x 6.4 x 1 inches |
| Wattage | 50 watts |
| Whats in the box | 1x SainSmart 8-Channel Relay Module |

## Product Details

- **Brand:** SainSmart
- **Connector Type:** Through Hole
- **Contact Type:** Normally Open
- **Current Rating:** 20 Milliamps
- **Mounting Type:** DIN Rail Mount

## Images

![SainSmart 8-Channel Relay Module - Image 1](https://m.media-amazon.com/images/I/61cPdKAzAbL.jpg)
![SainSmart 8-Channel Relay Module - Image 2](https://m.media-amazon.com/images/I/51RhWgokLRL.jpg)
![SainSmart 8-Channel Relay Module - Image 3](https://m.media-amazon.com/images/I/51huMNFGuiL.jpg)
![SainSmart 8-Channel Relay Module - Image 4](https://m.media-amazon.com/images/I/51hZG7t-BBL.jpg)
![SainSmart 8-Channel Relay Module - Image 5](https://m.media-amazon.com/images/I/513lkVMv9yL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Easy to hook up, didn't blow up my Arduino!
*by A***N on November 29, 2012*

Experience: Software engineer, learning electronics with my Arduino. My dad is an EE talked me through all current measurements. SETUP: - Connect arduino powersupply 5v to VCC - Connect arduino Digital ground to ground - Connect arduino digital output to any IN1-IN8 - You're in business! CURRENT: I connected my meter in series and found I was drawing 64mA across the Arduino 5v power supply and 1.9mA across the Arduino output pin. I flipped it over and measured 7100ohms across the coil, meaning the coil is drawing 0.7mA at 5v. These numbers honestly seem a little low to me - e.g. I expected more like 19mA across the output, but 64mA across the power supply seems very reasonable with all eight relays drawing 400mA per the spec. Note: Arduino max power supply voltage is 500mA on USB, so you're good there too. PROS: - This won't blow up your Arduino. - I didn't realize this model had LEDs. I looked at the 4 relay model and the LEDs are bigger, but these are smaller and work great. - LED's in the circuit act as diodes. My dad told me when the field collapses on a DC coil it generates a negative voltage. If you don't have a diode in the way you could burn up your output transistor. - This has NC (Normal Closed) and NO (Normal Open) contacts on the high voltage side. So if you want your lights ON or OFF by default you can do that. It has a nice diagram on the board showing how the high voltage contacts are laid out. - Price - 4 mounting holes on the board if you need to bolt it to something! - Lot's of fun - you should buy one! CONS: - N/A OTHER: - The header PINs are really nice, but I only have male breadboard jumpers and need to buy some male-female jumpers from radio shack before I can hook this baby up to my xMas light setup!!

### ⭐⭐⭐⭐⭐ Opto-isolation, indicators, 3.3/5V and breadboard-friendly. Good price, but be careful tightening terminals.
*by R***T on November 27, 2014*

These are wonderful and a great value. These have both optical and magnetic isolation, providing a lot of protection to the inputs from electrical faults on the outputs. They work well with 3.3V and 5V logic (RasPi, Teensy, Arduino, ...), requiring little current drive. Very breadboard-friendly if you use a simple M/F jumper wire. They have indicator LEDs that can save you hours of problem-determination time, aid classroom demonstrations and reassure you things are working as expected. They're red, so someone might confuse them with error LEDs. The contacts have fairly low bounce and quick switch-over time. They have 3 terminals per SPDT relay, but they are soldered to the board, not on a connector. This is the only drawback I can find with this product. If you twist too hard, you can ruin the terminal. Fortunately it's a common header and easy to resolder.

### ⭐⭐⭐⭐⭐ Great device!
*by C***C on January 1, 2014*

This is a fantastic thing to have with Arduino. I honestly only bought this because I had a gift card and it looked semi interesting but I have really kept myself entertained with it. No regrets. Hook the relay boards VCC to the +5 on the Arduino, the boards GND to the Arduinos Ground and then just use simple HIGH and LOW digital pin states in Arduino with the board pins. Each relay has three terminals. One input terminal and the other two are for a normal-open output and closed output making this pretty versatile. The relays are very fast too. I wouldn't try to switch them below 40ms though (the fast parts in the video are 46ms on/off) since that may cause some wear or you may get some bad switching. These would be great for a christmas light setup if you're in to that. I still haven't figured out what I want to do with this in the long run but it is very cool and I can see a lot of potential in it. For now I just decided to make a quick sketch to a song (using only HIGH/LOW pin states and delays). I think I'll hook it up to some lights or something eventually.

## Frequently Bought Together

- SainSmart 8-Channel Relay Module
- 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
- EDGELEC 120pcs Breadboard Jumper Wires 10cm 15cm 20cm 30cm 40cm 50 cm 100cm Wire Length Optional Dupont Cable Assorted Kit Male to Female Male to Male Female to Female Multicolored Ribbon Cables

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-02-13*