Struggling to connect legacy RS-232 equipment to a modern laptop? The USB to Serial adapter cable gives you a quick, reliable bridge, turning any USB-A port into a full-size DB-9 serial interface so you can keep older devices up and running without hunting for obsolete hardware.
Key Features of a 0.3 m USB to Serial
- Cable length: 0.3 m. Short enough for tidy desk setups while reaching most devices.
- Connector type: 9 pin D-Sub (DB-9) male - screwable for a secure fit on serial gear.
- LED indicators: Data TX/RX LEDs. Let you see activity instantly for easy troubleshooting.
- COM retention: Automatic COM port reassignment after disconnects or reboots, so you never lose your settings.
- Gold-plated connectors: Improved conductivity that reduces signal loss over time.
- Shielded cable: Copper shielding cuts down EMI/RFI, keeping data clean in busy environments.
- ESD protection: Level-4 (15 kV air, 8 kV contact) safeguards both the adapter and your equipment.
- Weight: 1.06 oz. Light enough to carry, sturdy enough to stay put.
Why Choose a StarTech.com USB to Serial
If you work with industrial machines, point-of-sale terminals, or scientific instruments that still speak RS-232, you need a dependable way to link them to today’s computers. Many adapters are flaky, lose connections, or require complex driver installs. This cable plugs into any USB-A port, installs drivers automatically on Windows, macOS, ChromeOS and Linux, and keeps the COM port consistent, removing the usual headaches of legacy connectivity.
Benefits of StarTech.com USB to Serial
- Plug-and-play: No manual driver hunting, just connect and work.
- Reliable link: LED status lights give instant feedback on data flow.
- Durable build: Rugged TPE housing and high-level ESD protection extend lifespan.
- Consistent COM port: Automatic retention means your software settings stay intact.
Usages of a 0.3 m USB to Serial
Ideal for connecting desktop PCs or laptops to serial-based barcode scanners, network switches, CNC machines, laboratory instruments, and point-of-sale terminals, this short cable fits neatly on crowded workstations while delivering stable, interference-free communication.
Specifications
| Cable |
| Cable / Right Connector Gender | Male |
| Cable / Technology | Shielded |
| Cable / Cable Subcategory | USB |
| Cable / I/O Cable Type | USB / serial cable |
| Cable / Right Connector Type | 9 pin D-Sub (DB-9) |
| Cable / Left Connector Gender | Male |
| Cable / Left Connector Type | 4 pin USB Type A |
| Cable / Compliant Standards | USB 2.0 / USB 1.1 |
| Miscellaneous |
| Miscellaneous / Color Category | Black |
| Miscellaneous / Compliant Standards | USB 2.0 / USB 1.1, RoHS, RS-232 |
| Header |
| Header / Model | 1ft (30cm) USB to Serial Adapter Cable, COM Retention, RS232 |
| Header / Product Line | StarTech |
| Header / Packaged Quantity | 1 |
| Service & Support |
| Service & Support / Type | 2-year warranty |
| General |
| General / Technology | Shielded |
| General / Weight | 1.06 oz |
| General / Type | USB / serial cable |
| General / Plated Connector | Gold |
| General / Cable Length | 12 in |
| General / Features | Molded, rugged, EMI/RFI protection, electrostatic discharge (ESD) protection, LED status indicator, Chipset FTDI FT232R, bus powered, COM retention |
| Connectivity |
| Connectivity / Connector | 4 pin USB Type A - male |
| Connectivity / Connector (Second End) | 9 pin D-Sub (DB-9) - male - screwable |
| Dimensions & Weight (Shipping) |
| Dimensions & Weight (Shipping) / Service & Support | 2-year warranty |
| Summary Details |
| Product colour | Black |
| Cable length | 0.3 m |
| Connector 1 | USB Type-A |
| Quantity per pack | 1 pc(s) |
| Package width | 220 mm |
| Package depth | 300 mm |
| Weight | 30 g |
| Master (outer) case width | 600 mm |
| Master (outer) case length | 485 mm |
| Master (outer) case height | 345 mm |
