---
product_id: 638085915
title: "5Pcs 3-5V Optocoupler Isolation Board Optoelectronic Isolator EL817 PC817 Card Rail Bracket Input 3-5 V Optocoupler Isolation Module 1 Channel Opto PNP NPN Signal Converter"
brand: "ec buying"
price: "S$27"
currency: SGD
in_stock: true
reviews_count: 3
url: https://www.desertcart.sg/products/638085915-5pcs-3-5v-optocoupler-isolation-board-optoelectronic-isolator-el817-pc817
store_origin: SG
region: Singapore
---

# 3-5V input voltage range 5KHz max signal frequency 3000V+ isolation voltage 5Pcs 3-5V Optocoupler Isolation Board Optoelectronic Isolator EL817 PC817 Card Rail Bracket Input 3-5 V Optocoupler Isolation Module 1 Channel Opto PNP NPN Signal Converter

**Brand:** ec buying
**Price:** S$27
**Availability:** ✅ In Stock

## Summary

> 🛠️ Elevate your electronics game with precision isolation and flawless signal flow!

## Quick Answers

- **What is this?** 5Pcs 3-5V Optocoupler Isolation Board Optoelectronic Isolator EL817 PC817 Card Rail Bracket Input 3-5 V Optocoupler Isolation Module 1 Channel Opto PNP NPN Signal Converter by ec buying
- **How much does it cost?** S$27 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/638085915-5pcs-3-5v-optocoupler-isolation-board-optoelectronic-isolator-el817-pc817)

## Best For

- ec buying enthusiasts

## Why This Product

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

## Key Features

- • **Compact & Ready-to-Mount:** Card rail bracket design for effortless installation in professional setups
- • **Seamless Signal Isolation:** EL817 optocoupler ensures crystal-clear signal separation for safer circuits
- • **Wide Voltage Compatibility:** Operates smoothly from 3V input up to 24V output for versatile device integration
- • **Efficient Signal Conversion:** Supports up to 5KHz frequency for fast, accurate data transmission
- • **Robust Environmental Tolerance:** Works reliably from -55°C to 110°C, built for demanding conditions

## Overview

The EC Buying 5Pcs EL817 Optocoupler Isolation Boards deliver reliable 1-channel optoelectronic isolation with a broad 3-5V input range and up to 24V output. Featuring over 3000V isolation voltage and a max 5KHz signal frequency, these modules ensure safe, efficient signal conversion across harsh environments (-55°C to 110°C). Designed with a card rail bracket for easy integration, they are ideal for professional-grade electronic systems requiring robust signal integrity.

## Description

5Pcs 3-5V Optocoupler Isolation Board Optoelectronic Isolator EL817 PC817 Card Rail Bracket Input 3-5 V Optocoupler Isolation Module 1 Channel Opto PNP NPN Signal Converter

## Features

- 1-way optocoupler isolation module with EL817 features, providing input voltage of DC 3V ~ 5V and output voltage suitable for DC1.8V-24V, ensuring broad voltage application and optimal signal conversion for various devices
- Opto-isolator with isolation voltage greater than 3000V, offers maximum input current of 50MA and working temperature range of -55~110 degrees, ensuring reliable and safe signal isolation and conversion in diverse environments
- PC817 Card Rail Bracket Input 3-5V Optocoupler Isolation Module with maximum output current 50MA, designed for input current within 15-20MA and maximum application signal frequency of 5KHz, ensuring efficient signal conversion and transmission
- Optocoupler featuring operating current> 1 MA, suitable for a wide range of input and output signal voltage, and provides optimal signal transmission and conversion for electronic devices and circuits
- The card guide rail bracket input 3-5V, the optoelectronic isolator provides a reliable and versatile solution for signal isolation and conversion, ensuring seamless integration and operation in various electronic systems

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | EC Buying |
| Item model number | EL817 |
| Item Weight | 1.7 ounces |
| Package Dimensions | 6.73 x 4.57 x 0.55 inches |
| Manufacturer | EC Buying |
| ASIN | B0D3CX6NP6 |
| Date First Available | May 6, 2024 |

## Product Details

- **Brand:** EC Buying
- **Item Weight:** 1.7 Ounces
- **Input Voltage:** 5 Volts
- **Output Voltage:** 5 Volts
- **Plug Format:** Type A

## Images

![5Pcs 3-5V Optocoupler Isolation Board Optoelectronic Isolator EL817 PC817 Card Rail Bracket Input 3-5 V Optocoupler Isolation Module 1 Channel Opto PNP NPN Signal Converter - Image 1](https://m.media-amazon.com/images/I/61G+gVTLDkL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Quality
*by C***. on November 13, 2024*

Very Good

### ⭐⭐⭐⭐⭐ Solid Components
*by K***. on June 11, 2024*

Update: I'm a dummy -In my original 'I'm not sure what's happening' review, I failed to take resistance into account.After testing both Gnd-Out and Gnd-VCC resistances (with input triggered), I found readings of around 300 and 10k, respectively.Retested with 5v supply and appropriate load between ground and out (white LED with forward voltage ~ 2.75v) - worked like a charm. See last 2 photos.Original review:***I was able to get this EL817 based opto to trigger instantly with 3-5v input, but have not had success closing a circuit consisting of a 6v power source and ~ 5v load via any combination of the output terminals, including tying input/output grounds together.The boards appear well manufactured, and the components I've tested give consistent readings, so I'm certain that I'm missing something.Will continue tinkering and update this review with my eventual outcome.

### ⭐⭐⭐⭐⭐ Handy for electrical isolation
*by D***S on August 15, 2024*

I have used optocouplers all my life, but typically only in breadboards or as part of a larger printed circuit. These little modules let me add optical isolation off-board and after design lock, so if I need isolation for just one or a few signals I can add it after the fact. I find uses for these all the time. Recommended.

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-03-01*