Generic Serial Adaptor DB-9 Male to DB-25 Female Connector

Generic Serial Adaptor DB-9 Male to DB-25 Female Connector

This is a passive serial port adaptor that bridges DB-9 (9-pin D-Sub) and DB-25 (25-pin D-Sub) connectors. Serial adaptors like this are used to connect legacy computer equipment, terminals, printers, modems, and industrial control devices across different serial port standards. The male DB-9 connector plugs into equipment or a computer's serial port, while the female DB-25 connector accepts a standard serial cable or device connector.

Specifications & What's Included

• Source connector: DB-9 Male (9-pin D-Sub)
• Destination connector: DB-25 Female (25-pin D-Sub)
• Interface standard: RS-232 serial
• Passive adaptor (no power or electronics required)
• Connector type: D-subminiature (D-Sub)

Applications

Serial adaptors are still actively used in legacy system maintenance, industrial automation, laboratory equipment control, and data center environments where older terminals, printers, modems, and control devices remain in service. The DB-9-to-DB-25 pairing was common in the 1980s and 1990s when computers and peripherals transitioned between these two connector standards. Today, these adaptors provide a simple, cost-effective way to extend the life of older serial equipment or to integrate vintage systems into modern troubleshooting and data recovery workflows.