DB9 Tripp Lite In-Line Surge Protector: Datasheet, DB9 connector vs RS232, DB9 Pinout
SURGE SUPPRESSOR RS-232 DB9M/F
DB9 is computer equipment. This article is going to introduce pinout, features, and more details about DB9.

Soldering DB9 Connectors
Overview of DB9
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.
Where are DB9 Connectors used?
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Today, the DB9 has mostly been replaced by more modern interfaces such as USB, PS/2, Firewire, and others.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 Featurees
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.
Specifications
- TypeParameter
- Factory Lead Time2 Weeks
- Number of Pins9
- Voltage Rated
RATED voltage is the voltage on the nameplate - the "design point" for maximum power throughput and safe thermal operation.
230V - Part Status
Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.
Active - Moisture Sensitivity Level (MSL)
Moisture Sensitivity Level (MSL) is a standardized rating that indicates the susceptibility of electronic components, particularly semiconductors, to moisture-induced damage during storage and the soldering process, defining the allowable exposure time to ambient conditions before they require special handling or baking to prevent failures
1 (Unlimited) - Voltage - Rated DC
Voltage - Rated DC is a parameter that specifies the maximum direct current (DC) voltage that an electronic component can safely handle without being damaged. This rating is crucial for ensuring the proper functioning and longevity of the component in a circuit. Exceeding the rated DC voltage can lead to overheating, breakdown, or even permanent damage to the component. It is important to carefully consider this parameter when designing or selecting components for a circuit to prevent any potential issues related to voltage overload.
230V - Current Rating
Current rating is the maximum current that a fuse will carry for an indefinite period without too much deterioration of the fuse element.
340A - Output Voltage
Output voltage is a crucial parameter in electronic components that refers to the voltage level produced by the component as a result of its operation. It represents the electrical potential difference between the output terminal of the component and a reference point, typically ground. The output voltage is a key factor in determining the performance and functionality of the component, as it dictates the level of voltage that will be delivered to the connected circuit or load. It is often specified in datasheets and technical specifications to ensure compatibility and proper functioning within a given system.
230V - Output Current
The rated output current is the maximum load current that a power supply can provide at a specified ambient temperature. A power supply can never provide more current that it's rated output current unless there is a fault, such as short circuit at the load.
340A - Accessory Type
Accessory Type in electronic components refers to additional items or attachments that enhance the functionality or usability of primary components. These can include connectors, adapters, mounting hardware, and protective casings. Accessory Types are essential for ensuring compatibility and achieving optimal performance in electronic systems.
Surge Suppressor - Response Time
the time taken for a circuit or measuring device, when subjected to a change in input signal, to change its state by a specified fraction of its total response to that change.
1 ns - Clamping Voltage
Clamping voltage is a term used in electronic components, particularly in devices like diodes and transient voltage suppressors. It refers to the maximum voltage level at which the component can effectively limit or clamp the voltage across its terminals. When the voltage across the component exceeds the clamping voltage, the component conducts and effectively limits the voltage to that level, protecting the circuit from overvoltage conditions. Clamping voltage is an important parameter to consider when selecting components for applications where voltage spikes or surges may occur, as it determines the level at which the component will start to protect the circuit.
18V - Max Surge Current
Surge current is a peak non repetitive current. Maximum (peak or surge) forward current = IFSM or if(surge), the maximum peak amount of current the diode is able to conduct in forward bias mode.
340A - Specifications
a measure of a material's ability to?conduct heat.?
Protection on all 9 data lines - REACH SVHC
The parameter "REACH SVHC" in electronic components refers to the compliance with the Registration, Evaluation, Authorization, and Restriction of Chemicals (REACH) regulation regarding Substances of Very High Concern (SVHC). SVHCs are substances that may have serious effects on human health or the environment, and their use is regulated under REACH to ensure their safe handling and minimize their impact.Manufacturers of electronic components need to declare if their products contain any SVHCs above a certain threshold concentration and provide information on the safe use of these substances. This information allows customers to make informed decisions about the potential risks associated with using the components and take appropriate measures to mitigate any hazards.Ensuring compliance with REACH SVHC requirements is essential for electronics manufacturers to meet regulatory standards, protect human health and the environment, and maintain transparency in their supply chain. It also demonstrates a commitment to sustainability and responsible manufacturing practices in the electronics industry.
Unknown - RoHS Status
RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.
RoHS Compliant
DB9 Pinout

DB9 Pinout
DB9 connector vs RS232

RS232 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.
DB9 Manufacturer
Outstanding product reliability and exceptional service have been Tripp Lite's trademarks for over 95 years. Tripp Lite manufactures over 4,000 products to power and connect the computers, networking equipment, and electronic devices that form the foundation of our connected world. On the desktop, in the data center, wherever power and information flow, products and services that solve customers' problems and meet their highest expectations are the hallmarks of a Tripp Lite solution. Headquartered in Chicago, Illinois, Tripp Lite maintains a global presence with offices and partners worldwide.
Datasheet PDF
- Datasheets :
- Environmental Information :
Popularity by Region
Parts with Similar Specs
How many pins of DB9 ?
9 pins.
Is DB9 and VGA the same?
No, not exactly, a D-Sub connector considered a E shell type. The VGA standard is a DE-15-HD Connector but is commonly miss called a D-Sub 15 pin. This is also the same size E shell used in the 9 pins D-Sub common on older CGA/EGA and still used on some COM Ports.
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