--- product_id: 378228505 title: "DTECH DB9 to RJ45 Serial Adapter RS232 Male to RJ-45 Female Ethernet Converter Compatible with Standard 9 Pin RS-232 Devices" brand: "dtech" price: "Β₯3210" currency: JPY in_stock: true reviews_count: 3 category: "Dtech" url: https://www.desertcart.jp/products/378228505-dtech-db9-to-rj45-serial-adapter-rs232-male-to-rj store_origin: JP region: Japan --- # Supports 1 Amp current rating Extends RS232 signals up to 65ft DB9 Male to RJ45 Female adapter DTECH DB9 to RJ45 Serial Adapter RS232 Male to RJ-45 Female Ethernet Converter Compatible with Standard 9 Pin RS-232 Devices **Brand:** dtech **Price:** Β₯3210 **Availability:** βœ… In Stock ## Summary > πŸ”— Bridge the old with the new β€” RS232 meets RJ45 in style! ## Quick Answers - **What is this?** DTECH DB9 to RJ45 Serial Adapter RS232 Male to RJ-45 Female Ethernet Converter Compatible with Standard 9 Pin RS-232 Devices by dtech - **How much does it cost?** Β₯3210 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/378228505-dtech-db9-to-rj45-serial-adapter-rs232-male-to-rj) ## 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 - β€’ **Universal Compatibility:** Works flawlessly with laptops, printers, modems, routers, CNC machines, and more. - β€’ **Extend Your Reach Up to 65 Feet:** Break free from short cables and connect devices across your workspace effortlessly. - β€’ **Secure & Hassle-Free Connection:** Thumbscrews ensure your adapter stays locked in place during critical operations. - β€’ **Cost-Effective Networking Upgrade:** Leverage affordable Cat5/Cat6 cables to modernize your serial communication setup. - β€’ **Seamless Serial Data Over Ethernet:** Convert your classic RS232 devices to modern RJ45 cabling with ease. ## Overview The DTECH DB9 to RJ45 Serial Adapter is a compact, reliable solution designed to convert standard 9-pin RS232 serial connections into RJ45 Ethernet-compatible interfaces. Supporting data transmission distances up to 65 feet over Cat5 or Cat6 cables, it ensures secure, bi-directional communication for a wide range of professional devices including laptops, printers, routers, and industrial equipment. With a sturdy matte finish and thumbscrew locking mechanism, this adapter combines durability with ease of use, making it an essential tool for modernizing legacy serial setups. ## Description Connector A: DB9 9 Pin Male 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 Male to RJ45 Female Serial Adapter Review: Good product - They worked perfectly Review: It did not work. - It did not work. ## Features - A simple, cost effective solution to process serial data communication between RS232 COM port devices over inexpensive cat5 cat6 RJ45 network cable - DB9 male to RJ45 modular adapter converts DB9 male connector into an RJ45 female connector (DB9 male - RJ45 Female pinout: straight through 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 male 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 | B08JLX4N6K | | Best Sellers Rank | #42,479 in Computers ( See Top 100 in Computers ) #124 in Serial Adapters | | Brand | DTECH | | Color | black | | Colour | black | | Compatible Devices | Desktop | | Compatible devices | Desktop | | Connector Type | RJ45 | | Connector type | RJ45 | | Current Rating | 1 Amps | | Customer Reviews | 4.3 out of 5 stars 63 Reviews | | Finish | Matte | | Finish type | Matte | | Item Type Name | RS232 to Ethernet Converter | | Item Weight | 0.02 Kilograms | | Manufacturer | DTECH | | Mfr Part Number | CB0240 | | Model Number | CB0240 | | Number of Items | 1 | | Number of Ports | 2 | | Package Quantity | 1 | | Power Plug Type | No Plug | | Specific Uses For Product | PC | | Specific uses for product | PC | | Unit Count | 1.0 Count | | Warranty Type | Limited | ## Product Details - **Brand:** DTECH - **Colour:** black - **Compatible devices:** Desktop - **Connector type:** RJ45 - **Specific uses for product:** PC ## Images ![DTECH DB9 to RJ45 Serial Adapter RS232 Male to RJ-45 Female Ethernet Converter Compatible with Standard 9 Pin RS-232 Devices - Image 1](https://m.media-amazon.com/images/I/51Zfc6V09PL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good product *by R***N on 31 January 2026* They worked perfectly ### ⭐ It did not work. *by C***E on 12 September 2026* It did not work. ### ⭐ Does not work *by T***R on 27 April 2023* This does not work I checked the wiring connection to make sure I was getting the correct wiring configuration but does not work and it's just wasting my time while waiting on another company to ship one ## Frequently Bought Together - DTECH DB9 to RJ45 Serial Adapter RS232 Male to RJ-45 Female Ethernet Converter Compatible with Standard 9 Pin RS-232 Devices - SABRENT USB 2.0 to Serial (9 Pin) DB 9 RS 232 Converter Cable, Prolific Chipset, HEXNUTS, [Windows 11/10/8.1/8/7/VISTA/XP, Mac OS X 10.6 and Above] 2.5 Feet (CB-DB9P) - OIKWAN USB to RS232, USB Serial Adapter with FTDI Chipset,USB 2.0 to Male DB9 Serial Cable for Windows 11,10, 8, 7, Vista, XP, 2000, Linux and Mac OS(6ft)… --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/378228505-dtech-db9-to-rj45-serial-adapter-rs232-male-to-rj](https://www.desertcart.jp/products/378228505-dtech-db9-to-rj45-serial-adapter-rs232-male-to-rj) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-10-13*