DB9 Tripp Lite In-Line Surge Protector: Datasheet, DB9 connector vs RS232, DB9 Pinout

The DB9 connector (originally named DE-9) is an analog socket, with 9 pins, from the D-Subminiature (D-Sub) connector family. The DB9 has the smallest "footprint" of the D-Subminiature connectors. The prefix “D” represents the D-shape of the connector shell. The DB9 connector is mainly used in serial ports, allowing asynchronous data transmission according to the RS-232 standard (RS-232C). Note that there are DB9-DB25 adapters that easily convert a DB9 socket to DB25 and vice versa.

DB9 connectors were once very common on PCs and servers. DB9 connectors are designed to work with the EIA/TIA 232 serial interface standard, which determined the function of all nine pins as a standard so that multiple companies could design them into their products. DB9 connectors were commonly used for serial peripheral devices like keyboards, mice, joysticks, etc. Also, they are used on DB9 cable assemblies for data connectivity.

Today, the DB9 has mostly been replaced by more modern interfaces such as USB, PS/2, Firewire, and others. However, there are still many legacy devices that use the DB9 interface for serial communication.

• DB9 protects 9 pin serial connections for data-line surge suppression of data terminals, data communications equipment and PCs, printers, modems, and more.

• Reversible for use with male or female captive DB9 ports.

• Offers protection on all 9 data lines, plus D shell chassis.

• Surge suppression utilizing high-speed avalanche diodes diverts excess energies on the network to the ground.

Tripp Lite DB9 technical specifications, attributes, parameters and parts with similar specifications to Tripp Lite DB9.

DB9 Pinout

DB9, for example, is a 9 pin connector for a serial cable. You can see one here. RS-232, on the other hand, refers to the standard itself. RS-232 (sometimes called EIA-232) describes how systems can communicate with each other using a serial cable.

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Download datasheets and manufacturer documentation for Tripp Lite DB9.