StarTech.com
StarTech.com 9M351M-RS232-CABLE 3ft (1m) DB9 to 3.5mm Serial Cable
Best serial cable for calibrating professional AV equipment and digital displays.
This 1-meter serial cable connects devices with a 3.5mm audio jack to a DB9 RS232 port, enabling remote calibration for TVs, projectors, and digital signage. It features high-quality construction with aluminum-mylar shielding and metal shell connectors to minimize EMI interference. The durable PVC jacket and molded connectors with integrated strain relief protect against damage from strain and abrasion. Thumbscrews on the DB-9 connector ensure a secure, locked connection, preventing accidental disconnections.
$14.99
Owner Satisfaction
4.0
/ 5
Category Rank
2444
/ 2684
#2444 in Storage & Data Transfer Cables
Price vs Category Average
-72%
Below average
Cable Length
3.281
/ ft (m)
Who it's for
- IT professionals managing networking switches or custom industrial equipment
- Technicians requiring durable, reliable connections for critical data transfer
- Field engineers needing clutter-free connections for bench testing
Who should skip it
- Users with devices using non-standardized serial pinout configurations
- Modern laptop owners lacking native legacy DB9 serial ports
- Budget-conscious buyers seeking generic, lower-cost connectivity alternatives
Performance breakdown
Signal Integrity
Aluminum-mylar shielding effectively minimizes EMI interference for reliable data transmission.
Build Durability
Rugged PVC jacket and molded strain relief withstand frequent handling and abrasion.
Connection Security
Integrated thumbscrews lock the DB9 connector firmly to prevent accidental disconnections.
Compatibility
Standardized RS232 wiring ensures seamless integration with most professional AV equipment.
Connector Quality
Nickel-plated contacts provide consistent, corrosion-resistant signal transfer over long-term use.
Warranty Assurance
Lifetime coverage offers significant peace of mind for critical infrastructure installations.
Key Specs
Cable Length
3.28 ft (1m)
Conductor Gauge
28 AWG
Shielding Type
Aluminum Mylar
Connector A
Mini-phone Stereo Audio (3.5mm) Male
Connector B
DB-9 RS-232 Serial Male
Jacket Material
Polyvinyl Chloride (PVC)
Product Color
Black
Connector Plating
Nickel
Know before you buy
This cable is specifically designed to connect devices that use a 3.5mm serial port—often found on TVs, projectors, and digital signage—to a standard DB9 RS232 serial port on a computer or control system.
No, this is a data cable, not an audio cable. While it uses a 3.5mm connector, it is wired specifically for RS232 serial data transmission and will not carry audio signals.
Yes, it features aluminum-mylar shielding, which helps minimize electromagnetic interference (EMI) to ensure a stable and reliable data connection.
The DB9 connector includes integrated thumbscrews, allowing you to lock the cable securely into your port. This prevents accidental disconnections, which is especially important in permanent installations.
Yes, it is built for durability. It features a robust PVC jacket that resists abrasion and strain, along with molded connectors that include integrated strain relief to prevent damage at the connection points.
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