StarTech.com 3m Black Straight Through DB9 RS232 Serial Cable
Bottom line: The StarTech.com 3m Black Straight Through DB9 RS232 Serial Cable ($15.00 on Amazon as of 2026-10-26 22:16 UTC): Straight-through DB9 male-to-female wiring extends an existing RS232 run; main trade-off: straight-through pinout, so it cannot replace a null modem cable.
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*Price sourced from Amazon.com. Last updated 2026-10-26. Price and availability subject to change.
Pros & Cons
Pros
- ✓ Straight-through DB9 male-to-female wiring extends an existing RS232 run
- ✓ 10 ft / 3 m length repositions serial peripherals away from the host
- ✓ Shielding blocks EMI from nearby power supplies and drives
- ✓ Strain relief molding on both DB9 ends survives repeated reconnects
Cons
- ✗ Straight-through pinout, so it cannot replace a null modem cable
- ✗ Extension only: needs an existing serial cable or port on both ends
- ✗ No USB-to-serial conversion for machines without a DB9 port
- ✗ 3 m is fixed; longer runs need a different SKU or a coupler
Manufacturer description
The StarTech.com MXT1003MBK is a 10 ft (3 m) DB9 RS232 serial extension cable that gives you room to reposition serial peripherals without relocating the host machine. One end terminates in a DB9 male connector, the other in a DB9 female connector, so it extends an existing straight-through serial run rather than replacing it. That pinout makes it the right cable for console access on switches and routers, CNC and industrial controllers, POS hardware, barcode scanners, UPS monitoring ports, and retro PC gear that still speaks RS232. Shielding on this StarTech.com serial cable blocks EMI…
SpecPicks Verdict
SpecPicks scored StarTech.com 3m Black Straight Through DB9 RS232 Serial Cable using a rating × review-volume × price-fit model applied to published specs and reviews across the cables & connectors category. Compare with similarly-priced alternatives in the cables & connectors category before committing. 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.
Frequently Asked Questions
Is this a null modem cable?
No. The MXT1003MBK is straight through wired with a DB9 male connector on one end and a DB9 female on the other, so TX and RX are not crossed. Use a dedicated null modem cable if your device pair requires crossover wiring.
How long is the cable?
10 feet, or 3 meters. That is enough to move a serial peripheral to the far side of a desk or down a rack from the host port.
Will it work as a console cable for switches and routers?
It extends a serial console run when your existing console cable ends in a DB9. It is an extension, not a console cable itself, so you still need the device specific console cable or adapter on the equipment side.
Does it come with a warranty?
Yes. StarTech.com backs this DB9 RS232 serial cable with a Lifetime Warranty. Check the product listing for current terms and claim details.
Is the cable shielded against interference?
Yes. StarTech.com specifies high quality shielding to prevent EMI interference, which is what you want when the run passes near power supplies, drives, or motors.
Key Features
- 1x DB9 Serial (male) connector
- 1x DB9 Serial (female) connector
- High quality shielding prevents EMI interference
- DB9 connectors with strain relief molding
Full Specifications
| Brand | StarTech.com |
|---|---|
| Color | Black |
| Gauge | 28 |
| Model | MXT1003MBK |
| Wattage | 50 watts |
| Cable Type | Serial |
| Item Shape | Round |
| Model Name | 3m Black Straight Through DB9 RS232 Serial Cable,M/F |
| Unit Count | 1 Count |
| Item Length | 3 meters |
| Part Number | MXT1003MBK |
| Connector Type | Serial |
| Item Type Name | Data Transfer Cable |
| Number of Pins | 9 |
| Outer Material | Polyvinyl Chloride (PVC) |
| Number of Items | 1 |
| Special Feature | Data Transfer |
| Connector Gender | Male and Female |
| Specification Met | No |
| Compatible Devices | serial devices |
| Full listing title | StarTech.com 3m Black Straight Through DB9 RS232 Serial Cable - DB9 RS232 Serial Extension Cable - Male to Female Cable (MXT1003MBK), 10 ft / 3m |
Hardware benchmark data
Ready to buy?
StarTech.com 3m Black Straight Through DB9 RS232 Serial Cable - DB9 RS232 Serial Extension Cable - Male to Female Cable (MXT1003MBK), 10 ft / 3m 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.
*Price sourced from Amazon.com. Last updated 2026-10-26. Price and availability subject to change.
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