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StarTech DB9 RS232 Serial Cable Review: Reliable serial connections for legacy kit

StarTech.com 3m Black Straight Through DB9 RS232 Serial Cable - DB9 RS232 Serial Extension Cable - Male to Female Cable (MXT1003MBK)
4.7
[Included Connectors]  Contains both DB9 male and DB9 female connectors for flexible serial connectivity.
[EMI Shielding]  High-quality shielding minimizes electromagnetic interference for cleaner data transmission.
[Strain Relief Molding]  Molded strain relief prevents cable stress and extends connector lifespan.
[Secure Signal Integrity]  Robust design ensures stable, reliable serial communication under industrial conditions.
[Wide Compatibility]  Works with standard DB9 serial ports for easy integration with legacy equipment.
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Personal Computer accessory that supplies a dependable serial connection for legacy equipment, the StarTech DB9 RS232 Serial Cable. Expect less faff when linking consoles, instruments and older PCs and more confidence that communications remain stable. Is it the right choice for workshops and engineers who still rely on RS232?

⚡ At a Glance
  • Connection Reliability: High-quality shielding prevents EMI interference, maintaining clear serial communication
  • Best for: Workshops, engineers and technicians extending or maintaining RS232 links
  • Not ideal for: Users who require USB connectivity or serial-to-USB conversion

Straight-through 3m male-to-female DB9 RS232 serial cable with high-quality shielding. DB9 connectors include strain relief moulding to reduce stress and maintain secure connections.


Cleaner data transfers - thanks to high-quality shielding

Shielding around the cable reduces electromagnetic interference by blocking external noise from corrupting RS232 signal lines. That suppression helps preserve voltage levels and timing on the transmit and receive pins.

Fewer transmission errors and more consistent communication with legacy instruments and consoles.

Secure connector fit - with DB9 connectors and strain relief moulding

DB9 male and female connectors include strain relief moulding to relieve mechanical stress at connector solder points. The moulding helps prevent cable movement from transmitting force into the connector joints.

Reduced accidental disconnections and longer connector life in bench and workshop use.

Straight-through extension - with male-to-female DB9 wiring

Straight-through wiring maps pins directly between the male and female DB9 connectors, preserving the original RS232 pinout. No internal crossover or signal conversion is present.

Simple, plug-in extension for peripherals and serial ports that expect standard RS232 pinouts.

✨ The 4 Key Reasons for StarTech DB9 RS232 Serial Cable
  1. High-quality shielding - Reduces EMI for consistent data transfers over serial links.
  2. DB9 male and female connectors - Allows direct extension between legacy devices without adapters.
  3. Strain relief moulding - Lowers connector wear and prevents accidental disconnection during use.
  4. 3m straight-through cable - Provides extra reach for benches and rack-mounted equipment.
📋 Technical Details at a Glance
  • Category: Personal Computer accessory
  • Brand: StarTech
  • Product ID: B00A6GIV9K
  • Connector Type: DB9 RS232
  • Connectors: 1x DB9 male, 1x DB9 female
❓ Frequently Asked Questions

Q: What connectors are included on the cable?

A: One DB9 male connector and one DB9 female connector are included for direct RS232 connections.

Q: Does the cable reduce interference on serial lines?

A: High-quality shielding prevents EMI interference and helps maintain clearer serial communication.

Q: Is the wiring straight-through or crossed?

A: The cable uses straight-through male-to-female DB9 wiring, suitable for extending standard RS232 connections.

🏆 Our Verdict

Ideal for technicians, engineers and anyone maintaining legacy RS232 equipment. High-quality shielding combined with DB9 connectors and strain relief moulding ensures reliable, long-term serial links. While a basic accessory rather than a premium conversion solution, robust construction suggests dependable service over time.