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DTECH DB9 to RJ45 Serial Adapter RS232 Female to RJ-45 Female Ethernet Converter Compatible with Standard 9 Pin RS-232 Devices
DTECH

DTECH DB9 to RJ45 Serial Adapter RS232 Female to RJ-45 Female Ethernet Converter

Bottom line: The DTECH DB9 to RJ45 Serial Adapter RS232 Female to RJ-45 Female: Extends RS-232 signals up to 65ft over cheap cat5e/cat6 runs; main trade-off: needs two adapters plus a cable, so budget double.

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By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

Pros & Cons

Pros

  • ✓ Extends RS-232 signals up to 65ft over cheap cat5e/cat6 runs
  • ✓ Straight-through 1-1 through 8-8 pinout, no rewiring guesswork
  • ✓ Thumbscrews lock it to the DB9 port instead of pulling loose
  • ✓ Female DB9 and female RJ45 on one body, bi-directional either way

Cons

  • ✗ Needs two adapters plus a cable, so budget double
  • ✗ Pin 9 is unconnected, so 9-wire RS-232 setups lose ring indicator
  • ✗ Not a Cisco-style console adapter despite the RJ45 jack
  • ✗ Cat5e/cat6 patch cable is not included in the box

Manufacturer description

Connector A: DB9 9 Pin FemaleConnector B: RJ45 8 Pin FemaleData cabling transmission signal up to 20MCompatible 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…

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SpecPicks Verdict

SpecPicks scored DTECH DB9 to RJ45 Serial Adapter RS232 Female to RJ-45 Female… using a rating × review-volume × price-fit model applied to published specs and reviews across the cables & connectors category. DTECH's cables & connectors lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for cables & connectors of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key 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.

Full Specifications

BrandDTECH
Colorblack
FinishMatte
Unit Count1.0 Count
Model NumberCB0241
Warranty TypeLimited
Connector TypeRJ45
Item Type NameRS232 to Ethernet Converter
Mfr Part NumberCB0241
Number of Items1
Number of Ports2
Power Plug TypeNo Plug
Compatible DevicesDesktop
Warranty Description180 days from purchase date
Smart Home CompatibilityNot Smart Home Compatible
Specific Uses For ProductPC
Full listing titleDTECH DB9 to RJ45 Serial Adapter RS232 Female to RJ-45 Female Ethernet Converter Compatible with Standard 9 Pin RS-232 Devices

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DTECH DB9 to RJ45 Serial Adapter RS232 Female to RJ-45 Female Ethernet Converter Compatible with Standard 9 Pin RS-232 Devices is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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DTECH DB9 to RJ45 Serial Adapter RS232 Female to RJ-45 Female Ethernet Converter Compatible with Standard 9 Pin RS-232 Devices
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