D-Sub, D-Shaped Connector Terminators (0)
<h1> D-Sub, D-Shaped Connector Terminators </h1> <p> Products in this family are special use connectors based on the D-subminiature pattern, which are so named because of the D-shaped outline the mating portions of the connector and the relatively high interconnect density they offered at the time of the of their introduction. They differ from standard connectors of this style by incorporation of one or more resistors or other circuitry between selected connector contacts, serving to reduce signal reflections in high-speed communication applications. </p> <p>
D-Sub, D-Shaped Connector Jackscrews (0)
<h1> D-Sub, D-Shaped Connector Jackscrews </h1> <p> Jack Screws or Screw Lock assemblies solidify the connection between D-Sub connectors by physically screwing the male and female connectors together. It is important to note that some jackscrews come with hardware included, while others require additional hardware that is not included. </p> <p>
D-Sub, D-Shaped Connector Housings (0)
<h1> D-Sub, D-Shaped Connector Housings </h1> <p> Products in this family are components of D-subminiature style connectors, into which electrical contacts that have been applied to discrete wires can be inserted. So-named in reference to the shape of their mating end and their relatively high interconnect density at the time of introduction, an additional component known as a backshell is needed to form a connector assembly. Note that similar products assembled by means of soldering discrete wires in place are available though grouped separately, alongside similar items intended for mounting directly to a printed circuit board. </p> <p>
D-Sub, D-Shaped Connector Contacts (0)
<h1> D-Sub, D-Shaped Connector Contacts </h1> <p> D-Sub, D-Shaped Connector Contacts are male or female terminals for coaxial, pneumatic, power, signal, or voltage applications that are used with connectors that have a shield or molded base that is in the form of a "D". The typical wire gauges range from 2 to 36 AWG, and cover a broad range of coaxial cables such as RG174, RG178, RG179, RG180, RG187, RG188, RG196, RG316, RF58, RG141, and RG404. </p> <p>
D-Sub, D-Shaped Connector Backshells, Hoods (0)
<h1> D-Sub, D-Shaped Connector Backshells, Hoods </h1> <p> Products in this family are used for the construction or repair of D-subminiature (D-Sub) cables, so named because of the D-shaped shroud surrounding their mating region and the relatively high interconnect density they offered at the time of their introduction. These products serve to enclose the junction between the conductors in a cable and the contacts in the connector assembly, providing cable strain relief and facilities for mechanical fixation. </p> <p>
D-Sub, D-Shaped Connector Adapters (0)
<h1> D-Sub, D-Shaped Connector Adapters </h1> <p> D-Sub/D-Shaped Connector adapters are used to convert from one style D-Sub/D-Shaped connector to another D-Sub/D-Shaped connector in both free hanging or panel mount versions. Pin counts range from 9 to 104, in both standard and high density versions. </p> <p>
D-Sub, D-Shaped Connector Accessories (2709)
<h1> D-Sub, D-Shaped Connector Accessories </h1> <p> Products within this family are designed for use with standard D-style and related connectors, and serve ancillary functions such as sealing of a connector assembly, mechanical fixation, avoidance of accidental un-mating, protection of unmated connectors, cable strain relief, keying of connectors to discourage improper connections, facilitating system diagnostics, and others. </p> <p>
D-Sub Connector Assemblies (0)
<h1> D-Sub Connector Assemblies </h1> <p> D-subminiature connectors are named for the D-shaped shroud present at their mating end and the relatively high interconnect density offered at the time of their introduction. Products in this family, which are described as "connectors", incorporate the electrical contacts and the insulation system holding them in position as an integral unit. They are commonly used for board mount applications, although they can also be used for solder terminated cable mount. </p> <p>
Centronics Connectors (7836)
<h1> Centronics Connectors </h1> <p> Products in this family are interconnect devices typically used for wire-to-board connections in data applications. Combining a D-shaped shroud similar to that found on D-subminiature connectors with an inner contact set reminiscent of a card edge interconnect scheme, this connector style was commonly used for connecting printers and similar peripheral devices to computers during the late 20th century. </p> <p>

D-Sub, D-Shaped Connectors

D-Sub (D-shaped) connector is a classic electronic interconnection solution, and its name comes from the unique D-shaped metal shield profile.

 

1. D-Sub, D-Shaped Connectors Overview

‌Full Name‌: D-Subminiature Connector, first created by ITT Cannon in the United States in the 1950s.

‌Appearance Features‌: The shell is in the shape of the letter “D”, and the mechanical anti-misinsertion function is achieved through asymmetric design.

 

2. What is the Core Structure of D-Sub, D-Shaped Connectors?

‌Shell Material‌: The metal shell provides electromagnetic shielding and mechanical protection, and some models use plastic shells to reduce costs.

‌Contact Design‌: It includes two types: male head (pins) and female head (holes), supporting differential signal transmission to reduce electromagnetic interference.

‌Pin Density‌: It was known for its ultra-small size in the early days, and now high-density models have been developed to meet complex wiring needs.

 

3. Technology Evolution of D-Sub, D-Shaped Connectors

‌First Generation (1960s)‌

The double-layer protection structure (metal shell + plastic body) adapts to the harsh environment of aviation and military fields.

 

‌Second Generation (mid-1980s)‌

Stamping technology replaced lathe processing, significantly reducing manufacturing costs and promoting the popularization of computer peripherals.

 

‌Third Generation (1990s to Present)‌

The simplified structure is a single-layer shell, and the models are expanded to DA/DB/DC series to meet the needs of industrial control and medical equipment.

 

4. Specifications and Applications of D-Sub, D-Shaped Connectors

Category

Typical Specifications

Main Application Scenarios

Standard

9-pin, 15-pin, 25-pin

RS-232 serial port, VGA video interface

High-density

37-pin and above

Industrial automation, high-speed data transmission

Hybrid

High-low frequency composite design

Aerospace equipment, precision instruments

 

5. What are the Key Advantages of D-Sub, D-Shaped Connectors?

‌Stability‌: Gold-plated contacts and a multi-point grounding design ensure signal integrity.

‌Compatibility‌: Standardized interfaces support cross-generation device interconnection.

‌Durability‌: It can withstand more than 500 plug-in and unplug cycles, suitable for frequent maintenance scenarios.

 

With its modular design, this connector continues to play a key role in industrial control, medical equipment, and communication infrastructure.

 

6. D-Sub, D-Shaped Connectors FAQs

‌1) What is the origin of the name D-Sub? ‌

D-Sub stands for “D-Subminiature” and is named for its unique D-shaped shielding cover design. In the early days, it was called an “ultra-miniature” connector because of its miniaturization. Although the volume advantage is no longer prominent, the D-shaped structure still effectively prevents mis-insertion.

 

2) What are the main application areas of D-Sub connectors? ‌

‌Computer and Communication Equipment‌: such as VGA interface, serial port;

‌Industrial and Military‌: vibration-resistant design is suitable for aerospace and defense equipment;

‌Power and Signal Transmission‌: supports analog, digital, and power signals.

 

‌3) What is the difference between high-density D-Sub and standard D-Sub? ‌

High-density D-Sub increases the pin density under the same shell size (such as DB25 shell can accommodate a higher number of pins), which is suitable for compact space requirements, while the standard version has a sparser pin arrangement.

 

‌4) How does D-Sub achieve electromagnetic interference (EMI) protection? ‌

Through metal shell shielding and additional EMI filtering design (such as a Pi-type adapter), it is suitable for sensitive electronic environments.

 

‌5) What are the typical installation methods of D-Sub connectors? ‌

‌Board End Installation‌: welding or direct plug-in PCB installation; ‌

Cable Assembly‌: injection molding (non-removable) and assembly (removable metal/plastic back shell); ‌

Screw Fixing‌: ensure a stable connection to prevent accidental detachment.

 

‌6) What are the special uses of combined D-Sub connectors? ‌

Combined D-Sub integrates different types of interfaces (such as power + signal) in the same shell, reducing the complexity of the wiring harness and reducing the risk of signal interference.

 

‌7) What scenarios are micro D-Sub (Micro-D) suitable for? ‌

Designed for extreme environments (such as aerospace equipment), it is smaller and has a wide temperature range (-55°C to 125°C), suitable for high-density electronic devices.

 

‌8) How does the material selection of the D-Sub connector affect its performance? ‌

‌Metal Housing‌: Improves shielding and mechanical strength;

‌Lightweight Aluminum Backshell‌: For aerospace scenarios where weight reduction is required;

‌Plastic Insulator‌: Balances cost and basic protection needs.

 

‌9) How is the maintenance and reliability of D-Sub connectors? ‌

The pin and socket contact design supports on-site repairs, and the metal structure ensures long life (especially in vibration environments). Some models have a protection level of IP68 and are suitable for humid or dusty environments.