---
product_id: 241567114
title: "DB9 to RJ45 Serial Adapter RS232 Female to RJ-45 Female Ethernet Converter Compatible with Standard 9 Pin RS-232 Devices"
brand: "dtech"
price: "¥1822"
currency: JPY
in_stock: true
category: "Dtech"
url: https://www.desertcart.jp/products/241567114-db9-to-rj45-serial-adapter-rs232-female-to-rj-45
store_origin: JP
region: Japan
---

# Supports 20mA current rating Extends RS232 signals up to 65ft DB9 Female to RJ45 Female adapter DB9 to RJ45 Serial Adapter RS232 Female to RJ-45 Female Ethernet Converter Compatible with Standard 9 Pin RS-232 Devices

**Brand:** dtech
**Price:** ¥1822
**Availability:** ✅ In Stock

## Summary

> 🔗 Bridge the old with the new—RS232 meets RJ45 in style!

## Quick Answers

- **What is this?** DB9 to RJ45 Serial Adapter RS232 Female to RJ-45 Female Ethernet Converter Compatible with Standard 9 Pin RS-232 Devices by dtech
- **How much does it cost?** ¥1822 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/241567114-db9-to-rj45-serial-adapter-rs232-female-to-rj-45)

## Best For

- dtech enthusiasts

## Why This Product

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

## Key Features

- • **Extend Your Reach:** Boost your serial communication range up to 65 feet using affordable Cat5/Cat6 cables.
- • **Plug & Play Simplicity:** No drivers or power plugs needed—just connect and communicate instantly.
- • **Universal Compatibility:** Works flawlessly with standard 9-pin RS232 devices like printers, modems, CNC machines, and more.
- • **Secure & Hassle-Free Connection:** Thumbscrews ensure a tight, reliable fit—no accidental disconnects during critical operations.
- • **Seamless Serial Data Transmission:** Convert your legacy RS232 devices to modern RJ45 cabling with ease.

## Overview

The DTECH DB9 to RJ45 Serial Adapter is a compact, cost-effective solution designed to convert standard 9-pin RS232 serial connections into RJ45 interfaces, enabling serial data transmission over Cat5 or Cat6 cables up to 65 feet. Ideal for professionals managing legacy devices like printers, modems, CNC machines, and barcode scanners, it features a secure thumbscrew design and supports a 20mA current rating, ensuring reliable, plug-and-play connectivity without additional power requirements.

## Description

Connector A: DB9 9 Pin Female Connector B: RJ45 8 Pin Female Data cabling transmission signal up to 20M Compatible with Standard 9 Pin D-sub RS-232 Devices e.g. computer laptop, printer, modem, router, PDA, POS device, digital CNC machine tool, Barcode scanner, etc. Please be Noted: DB9 serial RJ45 adapter is only an adapter for extending RS232 serial data (max. distance 65ft), not a console adapter. Usually this adapter needs to be used in pairs. DB9 serial data is transmitted over the network cable. To use this pair of adapters, you need to connect them with a cat5e or CAT6 cable. What’s Included 1x DB9 Female to RJ45 Female Serial Adapter

## Features

- A simple, cost effective solution to process serial data communication between RS232 COM port devices over inexpensive cat5 cat6 RJ45 network cable
- DB9 female to RJ45 modular adapter converts DB9 female connector into an RJ45 female connector (DB9 female - RJ45 Female pinout: 1-1, 2-2, 3-3, 4-4, 5-5, 6-6, 7-7, 8-8, 9-x)
- A pair of DB9 to RJ45 socket coupler can be used a extender to extend rs232 serial signals up to 65ft
- Bi-directional DB-9 female to RJ-45 female converter comes with thumbscrews for easy and secure connection
- (Please be noted it's NOT 15 pin VGA video port) It's compatible with Standard 9 Pin D-sub RS-232 Devices e.g. computer laptop, printer, modem, router, PDA, POS device, digital CNC machine tool, Barcode scanner, etc.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08JLWRFH6 |
| Best Sellers Rank | #31 in Serial Adapters |
| Brand | DTECH |
| Color | black |
| Compatible Devices | Desktop |
| Connector Type | RJ45 |
| Current Rating | 20 milliamps |
| Customer Reviews | 4.5 4.5 out of 5 stars (171) |
| Finish | Matte |
| Item Type Name | RS232 to Ethernet Converter |
| Item Weight | 0.01 kg |
| Manufacturer | guangzhouditedianzikejiyouxiangongsi |
| Mfr Part Number | CB0241 |
| Model Number | CB0241 |
| Number of Items | 1 |
| Number of Ports | 2 |
| Package Quantity | 1 |
| Power Plug Type | No Plug |
| Specific Uses For Product | PC |
| Unit Count | 1 Count |
| Warranty Description | 180 days from purchase date |
| Warranty Type | Limited |

## Product Details

- **Brand:** DTECH
- **Color:** black
- **Compatible Devices:** Desktop
- **Connector Type:** RJ45
- **Specific Uses For Product:** PC

## Images

![DB9 to RJ45 Serial Adapter RS232 Female to RJ-45 Female Ethernet Converter Compatible with Standard 9 Pin RS-232 Devices - Image 1](https://m.media-amazon.com/images/I/519pJPO8fuL.jpg)

## Questions & Answers

**Q: Despite product title, this is not an "Ethernet Converter", is it? It just uses ethernet cable?**
A: Hi, DB9 to RJ45 adapter is used to process serial data communication between RS232 port devices over an inexpensive Ethernet cable, not to process Ethernet connection for internet signal.

**Q: Is the listed pinout correct for this product?**
A: Hello, this 9 pin to ethernet adapter's pinout is 1-1, 2-2, 3-3, 4-4, 5-5, 6-6, 7-7, 8-8, 9-x (straight through connector, please check the updated pinout picture)

**Q: Can this be used with a USB-to-RJ45 console/rollover cable to connect to DB9 console porton a switch or router?**
A: Hi, this straight through DB9 to RJ45 connector should work for your situation. If not, please feel free to contact us via the order page's "contact seller" for a return.

**Q: are these crossover (null modem) connectors or straight through?**
A: Hi, these are straight through DB9 to RJ45 connectors.

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-11-04*