What is D-SUB CONNECTOR?
The D-sub connector is a common electrical connector, well-known for its distinctive D-shaped metal shell and multi-pin design. It is widely used in computers, communications, and industrial control applications.
Features and Applications of D-SUB CONNECTOR
The name “D-sub” comes from the shape of its metal shield: one side flat and the other semi-circular, resembling the letter “D.” This design provides excellent mechanical stability and electromagnetic interference (EMI) protection.
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Durability
Designed for long-term use, suitable for environments requiring frequent insertion and removal.
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Multiple Pin Configurations
Available in various sizes and pin counts, such as 9-pin, 15-pin, 25-pin, etc.
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Standardization
Complies with military specifications such as MIL-C-24308.
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Shielding Function
The metal shell provides signal shielding, ensuring connection quality.
Main Types
D-sub connectors are divided into Standard Density and High Density types, distinguished by the number of pins accommodated within the same shell size.
| Shell Size | Standard Density Pin Count | High Density Pin Count | Common Applications |
|---|---|---|---|
| A | DA-15 (15-pin) | DA-26 (26-pin) | Legacy game ports, some networking equipment |
| B | DB-25 (25-pin) | DB-44 (44-pin) | Parallel ports (printer ports), serial ports (RS-232) |
| C | DC-37 (37-pin) | DC-62 (62-pin) | Industrial control, certain networking equipment |
| D | DD-50 (50-pin) | DD-78 (78-pin) | SCSI interface, industrial applications |
| E | DE-9 (9-pin) | DE-15 (15-pin) | Serial ports (RS-232), VGA video output |
Although commonly referred to as “DB-xx,” the correct naming should be based on shell size (e.g., DE, DB).
Common Applications
- Computer peripherals: monitors, printers, serial ports
- Video connections: DE-15 (VGA) for analog video output to monitors and projectors
- Communications & networking: telecom equipment, routers, switches, RS-232 serial communication
- Industrial & military: used in industrial control, aircraft, missiles, spacecraft for reliable connections
- Audio/Video equipment: applied in professional AV fields
Where to Buy D-SUB CONNECTOR
D-sub connectors are long-established products. Taiwanese manufacturers such as Chun Chi Industrial Co., Ltd. and Anytronic Corporation Limited have been producing them since 1988. Their products—made from LCP and PBT materials—are available in a wide range of specifications and are widely used in desktop computers, printers, monitors, and other electronic devices.
Introduction to D-SUB CONNECTOR Specifications and Components
